21727360

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^1\times {\mathrm{1997}}^1$

素因数の和:2033

約数の個数: 64

約数和(自身を含む): 55024920

約数和(自身を除く): 33297560

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 272, 320, 340, 544, 640, 680, 1088, 1360, 1997, 2176, 2720, 3994, 5440, 7988, 9985, 10880, 15976, 19970, 31952, 33949, 39940, 63904, 67898, 79880, 127808, 135796, 159760, 169745, 255616, 271592, 319520, 339490, 543184, 639040, 678980, 1086368, 1278080, 1357960, 2172736, 2715920, 4345472, 5431840, 10863680, 21727360]

約数ペア:

[(1, 21727360), (2, 10863680), (4, 5431840), (5, 4345472), (8, 2715920), (10, 2172736), (16, 1357960), (17, 1278080), (20, 1086368), (32, 678980), (34, 639040), (40, 543184), (64, 339490), (68, 319520), (80, 271592), (85, 255616), (128, 169745), (136, 159760), (160, 135796), (170, 127808), (272, 79880), (320, 67898), (340, 63904), (544, 39940), (640, 33949), (680, 31952), (1088, 19970), (1360, 15976), (1997, 10880), (2176, 9985), (2720, 7988), (3994, 5440)]