20919080

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{821}}^1$

素因数の和:859

約数の個数: 96

約数和(自身を含む): 59036040

約数和(自身を除く): 38116960

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 49, 52, 56, 65, 70, 91, 98, 104, 130, 140, 182, 196, 245, 260, 280, 364, 392, 455, 490, 520, 637, 728, 821, 910, 980, 1274, 1642, 1820, 1960, 2548, 3185, 3284, 3640, 4105, 5096, 5747, 6370, 6568, 8210, 10673, 11494, 12740, 16420, 21346, 22988, 25480, 28735, 32840, 40229, 42692, 45976, 53365, 57470, 74711, 80458, 85384, 106730, 114940, 149422, 160916, 201145, 213460, 229880, 298844, 321832, 373555, 402290, 426920, 522977, 597688, 747110, 804580, 1045954, 1494220, 1609160, 2091908, 2614885, 2988440, 4183816, 5229770, 10459540, 20919080]

約数ペア:

[(1, 20919080), (2, 10459540), (4, 5229770), (5, 4183816), (7, 2988440), (8, 2614885), (10, 2091908), (13, 1609160), (14, 1494220), (20, 1045954), (26, 804580), (28, 747110), (35, 597688), (40, 522977), (49, 426920), (52, 402290), (56, 373555), (65, 321832), (70, 298844), (91, 229880), (98, 213460), (104, 201145), (130, 160916), (140, 149422), (182, 114940), (196, 106730), (245, 85384), (260, 80458), (280, 74711), (364, 57470), (392, 53365), (455, 45976), (490, 42692), (520, 40229), (637, 32840), (728, 28735), (821, 25480), (910, 22988), (980, 21346), (1274, 16420), (1642, 12740), (1820, 11494), (1960, 10673), (2548, 8210), (3185, 6568), (3284, 6370), (3640, 5747), (4105, 5096)]