21121760

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^2\times {\mathrm{1091}}^1$

素因数の和:1128

約数の個数: 72

約数和(自身を含む): 54899208

約数和(自身を除く): 33777448

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 121, 160, 176, 220, 242, 352, 440, 484, 605, 880, 968, 1091, 1210, 1760, 1936, 2182, 2420, 3872, 4364, 4840, 5455, 8728, 9680, 10910, 12001, 17456, 19360, 21820, 24002, 34912, 43640, 48004, 60005, 87280, 96008, 120010, 132011, 174560, 192016, 240020, 264022, 384032, 480040, 528044, 660055, 960080, 1056088, 1320110, 1920160, 2112176, 2640220, 4224352, 5280440, 10560880, 21121760]

約数ペア:

[(1, 21121760), (2, 10560880), (4, 5280440), (5, 4224352), (8, 2640220), (10, 2112176), (11, 1920160), (16, 1320110), (20, 1056088), (22, 960080), (32, 660055), (40, 528044), (44, 480040), (55, 384032), (80, 264022), (88, 240020), (110, 192016), (121, 174560), (160, 132011), (176, 120010), (220, 96008), (242, 87280), (352, 60005), (440, 48004), (484, 43640), (605, 34912), (880, 24002), (968, 21820), (1091, 19360), (1210, 17456), (1760, 12001), (1936, 10910), (2182, 9680), (2420, 8728), (3872, 5455), (4364, 4840)]