1638862820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{139}}^1\times {\mathrm{227}}^1$

素因数の和:442

約数の個数: 144

約数和(自身を含む): 4126489920

約数和(自身を除く): 2487627100

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 53, 70, 98, 106, 139, 140, 196, 212, 227, 245, 265, 278, 371, 454, 490, 530, 556, 695, 742, 908, 973, 980, 1060, 1135, 1390, 1484, 1589, 1855, 1946, 2270, 2597, 2780, 3178, 3710, 3892, 4540, 4865, 5194, 6356, 6811, 7367, 7420, 7945, 9730, 10388, 11123, 12031, 12985, 13622, 14734, 15890, 19460, 22246, 24062, 25970, 27244, 29468, 31553, 31780, 34055, 36835, 44492, 48124, 51569, 51940, 55615, 60155, 63106, 68110, 73670, 84217, 103138, 111230, 120310, 126212, 136220, 147340, 157765, 168434, 206276, 220871, 222460, 240620, 257845, 315530, 336868, 360983, 421085, 441742, 515690, 589519, 631060, 721966, 842170, 883484, 1031380, 1104355, 1179038, 1443932, 1546097, 1672309, 1684340, 1804915, 2208710, 2358076, 2947595, 3092194, 3344618, 3609830, 4417420, 5895190, 6184388, 6689236, 7219660, 7730485, 8361545, 11706163, 11790380, 15460970, 16723090, 23412326, 30921940, 33446180, 46824652, 58530815, 81943141, 117061630, 163886282, 234123260, 327772564, 409715705, 819431410, 1638862820]

約数ペア:

[(1, 1638862820), (2, 819431410), (4, 409715705), (5, 327772564), (7, 234123260), (10, 163886282), (14, 117061630), (20, 81943141), (28, 58530815), (35, 46824652), (49, 33446180), (53, 30921940), (70, 23412326), (98, 16723090), (106, 15460970), (139, 11790380), (140, 11706163), (196, 8361545), (212, 7730485), (227, 7219660), (245, 6689236), (265, 6184388), (278, 5895190), (371, 4417420), (454, 3609830), (490, 3344618), (530, 3092194), (556, 2947595), (695, 2358076), (742, 2208710), (908, 1804915), (973, 1684340), (980, 1672309), (1060, 1546097), (1135, 1443932), (1390, 1179038), (1484, 1104355), (1589, 1031380), (1855, 883484), (1946, 842170), (2270, 721966), (2597, 631060), (2780, 589519), (3178, 515690), (3710, 441742), (3892, 421085), (4540, 360983), (4865, 336868), (5194, 315530), (6356, 257845), (6811, 240620), (7367, 222460), (7420, 220871), (7945, 206276), (9730, 168434), (10388, 157765), (11123, 147340), (12031, 136220), (12985, 126212), (13622, 120310), (14734, 111230), (15890, 103138), (19460, 84217), (22246, 73670), (24062, 68110), (25970, 63106), (27244, 60155), (29468, 55615), (31553, 51940), (31780, 51569), (34055, 48124), (36835, 44492)]