81699880

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{1607}}^1$

素因数の和:1690

約数の個数: 64

約数和(自身を含む): 194503680

約数和(自身を除く): 112803800

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 41, 62, 82, 124, 155, 164, 205, 248, 310, 328, 410, 620, 820, 1240, 1271, 1607, 1640, 2542, 3214, 5084, 6355, 6428, 8035, 10168, 12710, 12856, 16070, 25420, 32140, 49817, 50840, 64280, 65887, 99634, 131774, 199268, 249085, 263548, 329435, 398536, 498170, 527096, 658870, 996340, 1317740, 1992680, 2042497, 2635480, 4084994, 8169988, 10212485, 16339976, 20424970, 40849940, 81699880]

約数ペア:

[(1, 81699880), (2, 40849940), (4, 20424970), (5, 16339976), (8, 10212485), (10, 8169988), (20, 4084994), (31, 2635480), (40, 2042497), (41, 1992680), (62, 1317740), (82, 996340), (124, 658870), (155, 527096), (164, 498170), (205, 398536), (248, 329435), (310, 263548), (328, 249085), (410, 199268), (620, 131774), (820, 99634), (1240, 65887), (1271, 64280), (1607, 50840), (1640, 49817), (2542, 32140), (3214, 25420), (5084, 16070), (6355, 12856), (6428, 12710), (8035, 10168)]