19977040

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{397}}^1$

素因数の和:464

約数の個数: 80

約数和(自身を含む): 50635152

約数和(自身を除く): 30658112

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 37, 40, 68, 74, 80, 85, 136, 148, 170, 185, 272, 296, 340, 370, 397, 592, 629, 680, 740, 794, 1258, 1360, 1480, 1588, 1985, 2516, 2960, 3145, 3176, 3970, 5032, 6290, 6352, 6749, 7940, 10064, 12580, 13498, 14689, 15880, 25160, 26996, 29378, 31760, 33745, 50320, 53992, 58756, 67490, 73445, 107984, 117512, 134980, 146890, 235024, 249713, 269960, 293780, 499426, 539920, 587560, 998852, 1175120, 1248565, 1997704, 2497130, 3995408, 4994260, 9988520, 19977040]

約数ペア:

[(1, 19977040), (2, 9988520), (4, 4994260), (5, 3995408), (8, 2497130), (10, 1997704), (16, 1248565), (17, 1175120), (20, 998852), (34, 587560), (37, 539920), (40, 499426), (68, 293780), (74, 269960), (80, 249713), (85, 235024), (136, 146890), (148, 134980), (170, 117512), (185, 107984), (272, 73445), (296, 67490), (340, 58756), (370, 53992), (397, 50320), (592, 33745), (629, 31760), (680, 29378), (740, 26996), (794, 25160), (1258, 15880), (1360, 14689), (1480, 13498), (1588, 12580), (1985, 10064), (2516, 7940), (2960, 6749), (3145, 6352), (3176, 6290), (3970, 5032)]