21604220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{283}}^1\times {\mathrm{347}}^1$

素因数の和:650

約数の個数: 48

約数和(自身を含む): 49811328

約数和(自身を除く): 28207108

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 283, 347, 566, 694, 1132, 1388, 1415, 1735, 2830, 3113, 3470, 3817, 5660, 6226, 6940, 7634, 12452, 15268, 15565, 19085, 31130, 38170, 62260, 76340, 98201, 196402, 392804, 491005, 982010, 1080211, 1964020, 2160422, 4320844, 5401055, 10802110, 21604220]

約数ペア:

[(1, 21604220), (2, 10802110), (4, 5401055), (5, 4320844), (10, 2160422), (11, 1964020), (20, 1080211), (22, 982010), (44, 491005), (55, 392804), (110, 196402), (220, 98201), (283, 76340), (347, 62260), (566, 38170), (694, 31130), (1132, 19085), (1388, 15565), (1415, 15268), (1735, 12452), (2830, 7634), (3113, 6940), (3470, 6226), (3817, 5660)]