19995800

素因数分解:

$2^3\times 5^2\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{149}}^1$

素因数の和:237

約数の個数: 96

約数和(自身を含む): 51894000

約数和(自身を除く): 31898200

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 25, 40, 44, 50, 55, 61, 88, 100, 110, 122, 149, 200, 220, 244, 275, 298, 305, 440, 488, 550, 596, 610, 671, 745, 1100, 1192, 1220, 1342, 1490, 1525, 1639, 2200, 2440, 2684, 2980, 3050, 3278, 3355, 3725, 5368, 5960, 6100, 6556, 6710, 7450, 8195, 9089, 12200, 13112, 13420, 14900, 16390, 16775, 18178, 26840, 29800, 32780, 33550, 36356, 40975, 45445, 65560, 67100, 72712, 81950, 90890, 99979, 134200, 163900, 181780, 199958, 227225, 327800, 363560, 399916, 454450, 499895, 799832, 908900, 999790, 1817800, 1999580, 2499475, 3999160, 4998950, 9997900, 19995800]

約数ペア:

[(1, 19995800), (2, 9997900), (4, 4998950), (5, 3999160), (8, 2499475), (10, 1999580), (11, 1817800), (20, 999790), (22, 908900), (25, 799832), (40, 499895), (44, 454450), (50, 399916), (55, 363560), (61, 327800), (88, 227225), (100, 199958), (110, 181780), (122, 163900), (149, 134200), (200, 99979), (220, 90890), (244, 81950), (275, 72712), (298, 67100), (305, 65560), (440, 45445), (488, 40975), (550, 36356), (596, 33550), (610, 32780), (671, 29800), (745, 26840), (1100, 18178), (1192, 16775), (1220, 16390), (1342, 14900), (1490, 13420), (1525, 13112), (1639, 12200), (2200, 9089), (2440, 8195), (2684, 7450), (2980, 6710), (3050, 6556), (3278, 6100), (3355, 5960), (3725, 5368)]