18901280

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{6949}}^1$

素因数の和:6981

約数の個数: 48

約数和(自身を含む): 47287800

約数和(自身を除く): 28386520

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 6949, 13898, 27796, 34745, 55592, 69490, 111184, 118133, 138980, 222368, 236266, 277960, 472532, 555920, 590665, 945064, 1111840, 1181330, 1890128, 2362660, 3780256, 4725320, 9450640, 18901280]

約数ペア:

[(1, 18901280), (2, 9450640), (4, 4725320), (5, 3780256), (8, 2362660), (10, 1890128), (16, 1181330), (17, 1111840), (20, 945064), (32, 590665), (34, 555920), (40, 472532), (68, 277960), (80, 236266), (85, 222368), (136, 138980), (160, 118133), (170, 111184), (272, 69490), (340, 55592), (544, 34745), (680, 27796), (1360, 13898), (2720, 6949)]