21169940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{2347}}^1$

素因数の和:2408

約数の個数: 48

約数和(自身を含む): 49702464

約数和(自身を除く): 28532524

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 44, 55, 82, 110, 164, 205, 220, 410, 451, 820, 902, 1804, 2255, 2347, 4510, 4694, 9020, 9388, 11735, 23470, 25817, 46940, 51634, 96227, 103268, 129085, 192454, 258170, 384908, 481135, 516340, 962270, 1058497, 1924540, 2116994, 4233988, 5292485, 10584970, 21169940]

約数ペア:

[(1, 21169940), (2, 10584970), (4, 5292485), (5, 4233988), (10, 2116994), (11, 1924540), (20, 1058497), (22, 962270), (41, 516340), (44, 481135), (55, 384908), (82, 258170), (110, 192454), (164, 129085), (205, 103268), (220, 96227), (410, 51634), (451, 46940), (820, 25817), (902, 23470), (1804, 11735), (2255, 9388), (2347, 9020), (4510, 4694)]