20855560

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:203

約数の個数: 96

約数和(自身を含む): 53625600

約数和(自身を除く): 32770040

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 31, 40, 44, 55, 62, 88, 110, 121, 124, 139, 155, 220, 242, 248, 278, 310, 341, 440, 484, 556, 605, 620, 682, 695, 968, 1112, 1210, 1240, 1364, 1390, 1529, 1705, 2420, 2728, 2780, 3058, 3410, 3751, 4309, 4840, 5560, 6116, 6820, 7502, 7645, 8618, 12232, 13640, 15004, 15290, 16819, 17236, 18755, 21545, 30008, 30580, 33638, 34472, 37510, 43090, 47399, 61160, 67276, 75020, 84095, 86180, 94798, 134552, 150040, 168190, 172360, 189596, 236995, 336380, 379192, 473990, 521389, 672760, 947980, 1042778, 1895960, 2085556, 2606945, 4171112, 5213890, 10427780, 20855560]

約数ペア:

[(1, 20855560), (2, 10427780), (4, 5213890), (5, 4171112), (8, 2606945), (10, 2085556), (11, 1895960), (20, 1042778), (22, 947980), (31, 672760), (40, 521389), (44, 473990), (55, 379192), (62, 336380), (88, 236995), (110, 189596), (121, 172360), (124, 168190), (139, 150040), (155, 134552), (220, 94798), (242, 86180), (248, 84095), (278, 75020), (310, 67276), (341, 61160), (440, 47399), (484, 43090), (556, 37510), (605, 34472), (620, 33638), (682, 30580), (695, 30008), (968, 21545), (1112, 18755), (1210, 17236), (1240, 16819), (1364, 15290), (1390, 15004), (1529, 13640), (1705, 12232), (2420, 8618), (2728, 7645), (2780, 7502), (3058, 6820), (3410, 6116), (3751, 5560), (4309, 4840)]