28746920

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{239}}^1$

素因数の和:378

約数の個数: 64

約数和(自身を含む): 67737600

約数和(自身を除く): 38990680

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 97, 124, 155, 194, 239, 248, 310, 388, 478, 485, 620, 776, 956, 970, 1195, 1240, 1912, 1940, 2390, 3007, 3880, 4780, 6014, 7409, 9560, 12028, 14818, 15035, 23183, 24056, 29636, 30070, 37045, 46366, 59272, 60140, 74090, 92732, 115915, 120280, 148180, 185464, 231830, 296360, 463660, 718673, 927320, 1437346, 2874692, 3593365, 5749384, 7186730, 14373460, 28746920]

約数ペア:

[(1, 28746920), (2, 14373460), (4, 7186730), (5, 5749384), (8, 3593365), (10, 2874692), (20, 1437346), (31, 927320), (40, 718673), (62, 463660), (97, 296360), (124, 231830), (155, 185464), (194, 148180), (239, 120280), (248, 115915), (310, 92732), (388, 74090), (478, 60140), (485, 59272), (620, 46366), (776, 37045), (956, 30070), (970, 29636), (1195, 24056), (1240, 23183), (1912, 15035), (1940, 14818), (2390, 12028), (3007, 9560), (3880, 7409), (4780, 6014)]