21697720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{4483}}^1$

素因数の和:4516

約数の個数: 48

約数和(自身を含む): 53673480

約数和(自身を除く): 31975760

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 121, 220, 242, 440, 484, 605, 968, 1210, 2420, 4483, 4840, 8966, 17932, 22415, 35864, 44830, 49313, 89660, 98626, 179320, 197252, 246565, 394504, 493130, 542443, 986260, 1084886, 1972520, 2169772, 2712215, 4339544, 5424430, 10848860, 21697720]

約数ペア:

[(1, 21697720), (2, 10848860), (4, 5424430), (5, 4339544), (8, 2712215), (10, 2169772), (11, 1972520), (20, 1084886), (22, 986260), (40, 542443), (44, 493130), (55, 394504), (88, 246565), (110, 197252), (121, 179320), (220, 98626), (242, 89660), (440, 49313), (484, 44830), (605, 35864), (968, 22415), (1210, 17932), (2420, 8966), (4483, 4840)]