19894980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{67}}^1\times {\mathrm{101}}^1$

素因数の和:194

約数の個数: 144

約数和(自身を含む): 66419136

約数和(自身を除く): 46524156

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 67, 70, 84, 98, 101, 105, 134, 140, 147, 196, 201, 202, 210, 245, 268, 294, 303, 335, 402, 404, 420, 469, 490, 505, 588, 606, 670, 707, 735, 804, 938, 980, 1005, 1010, 1212, 1340, 1407, 1414, 1470, 1515, 1876, 2010, 2020, 2121, 2345, 2814, 2828, 2940, 3030, 3283, 3535, 4020, 4242, 4690, 4949, 5628, 6060, 6566, 6767, 7035, 7070, 8484, 9380, 9849, 9898, 10605, 13132, 13534, 14070, 14140, 14847, 16415, 19698, 19796, 20301, 21210, 24745, 27068, 28140, 29694, 32830, 33835, 39396, 40602, 42420, 47369, 49245, 49490, 59388, 65660, 67670, 74235, 81204, 94738, 98490, 98980, 101505, 135340, 142107, 148470, 189476, 196980, 203010, 236845, 284214, 296940, 331583, 406020, 473690, 568428, 663166, 710535, 947380, 994749, 1326332, 1421070, 1657915, 1989498, 2842140, 3315830, 3978996, 4973745, 6631660, 9947490, 19894980]

約数ペア:

[(1, 19894980), (2, 9947490), (3, 6631660), (4, 4973745), (5, 3978996), (6, 3315830), (7, 2842140), (10, 1989498), (12, 1657915), (14, 1421070), (15, 1326332), (20, 994749), (21, 947380), (28, 710535), (30, 663166), (35, 568428), (42, 473690), (49, 406020), (60, 331583), (67, 296940), (70, 284214), (84, 236845), (98, 203010), (101, 196980), (105, 189476), (134, 148470), (140, 142107), (147, 135340), (196, 101505), (201, 98980), (202, 98490), (210, 94738), (245, 81204), (268, 74235), (294, 67670), (303, 65660), (335, 59388), (402, 49490), (404, 49245), (420, 47369), (469, 42420), (490, 40602), (505, 39396), (588, 33835), (606, 32830), (670, 29694), (707, 28140), (735, 27068), (804, 24745), (938, 21210), (980, 20301), (1005, 19796), (1010, 19698), (1212, 16415), (1340, 14847), (1407, 14140), (1414, 14070), (1470, 13534), (1515, 13132), (1876, 10605), (2010, 9898), (2020, 9849), (2121, 9380), (2345, 8484), (2814, 7070), (2828, 7035), (2940, 6767), (3030, 6566), (3283, 6060), (3535, 5628), (4020, 4949), (4242, 4690)]