20825680

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15313}}^1$

素因数の和:15343

約数の個数: 40

約数和(自身を含む): 51271272

約数和(自身を除く): 30445592

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15313, 30626, 61252, 76565, 122504, 153130, 245008, 260321, 306260, 520642, 612520, 1041284, 1225040, 1301605, 2082568, 2603210, 4165136, 5206420, 10412840, 20825680]

約数ペア:

[(1, 20825680), (2, 10412840), (4, 5206420), (5, 4165136), (8, 2603210), (10, 2082568), (16, 1301605), (17, 1225040), (20, 1041284), (34, 612520), (40, 520642), (68, 306260), (80, 260321), (85, 245008), (136, 153130), (170, 122504), (272, 76565), (340, 61252), (680, 30626), (1360, 15313)]