20338480

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{139}}^1$

素因数の和:242

約数の個数: 80

約数和(自身を含む): 49996800

約数和(自身を除く): 29658320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 59, 62, 80, 118, 124, 139, 155, 236, 248, 278, 295, 310, 472, 496, 556, 590, 620, 695, 944, 1112, 1180, 1240, 1390, 1829, 2224, 2360, 2480, 2780, 3658, 4309, 4720, 5560, 7316, 8201, 8618, 9145, 11120, 14632, 16402, 17236, 18290, 21545, 29264, 32804, 34472, 36580, 41005, 43090, 65608, 68944, 73160, 82010, 86180, 131216, 146320, 164020, 172360, 254231, 328040, 344720, 508462, 656080, 1016924, 1271155, 2033848, 2542310, 4067696, 5084620, 10169240, 20338480]

約数ペア:

[(1, 20338480), (2, 10169240), (4, 5084620), (5, 4067696), (8, 2542310), (10, 2033848), (16, 1271155), (20, 1016924), (31, 656080), (40, 508462), (59, 344720), (62, 328040), (80, 254231), (118, 172360), (124, 164020), (139, 146320), (155, 131216), (236, 86180), (248, 82010), (278, 73160), (295, 68944), (310, 65608), (472, 43090), (496, 41005), (556, 36580), (590, 34472), (620, 32804), (695, 29264), (944, 21545), (1112, 18290), (1180, 17236), (1240, 16402), (1390, 14632), (1829, 11120), (2224, 9145), (2360, 8618), (2480, 8201), (2780, 7316), (3658, 5560), (4309, 4720)]