21060921

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{401}}^1$

素因数の和:513

約数の個数: 32

約数和(自身を含む): 33497856

約数和(自身を除く): 12436935

約数列:

[1, 3, 7, 21, 41, 61, 123, 183, 287, 401, 427, 861, 1203, 1281, 2501, 2807, 7503, 8421, 16441, 17507, 24461, 49323, 52521, 73383, 115087, 171227, 345261, 513681, 1002901, 3008703, 7020307, 21060921]

約数ペア:

[(1, 21060921), (3, 7020307), (7, 3008703), (21, 1002901), (41, 513681), (61, 345261), (123, 171227), (183, 115087), (287, 73383), (401, 52521), (427, 49323), (861, 24461), (1203, 17507), (1281, 16441), (2501, 8421), (2807, 7503)]