21209910

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{521}}^1$

素因数の和:613

約数の個数: 64

約数和(自身を含む): 54120960

約数和(自身を除く): 32911050

約数列:

[1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 59, 69, 115, 118, 138, 177, 230, 295, 345, 354, 521, 590, 690, 885, 1042, 1357, 1563, 1770, 2605, 2714, 3126, 4071, 5210, 6785, 7815, 8142, 11983, 13570, 15630, 20355, 23966, 30739, 35949, 40710, 59915, 61478, 71898, 92217, 119830, 153695, 179745, 184434, 307390, 359490, 461085, 706997, 922170, 1413994, 2120991, 3534985, 4241982, 7069970, 10604955, 21209910]

約数ペア:

[(1, 21209910), (2, 10604955), (3, 7069970), (5, 4241982), (6, 3534985), (10, 2120991), (15, 1413994), (23, 922170), (30, 706997), (46, 461085), (59, 359490), (69, 307390), (115, 184434), (118, 179745), (138, 153695), (177, 119830), (230, 92217), (295, 71898), (345, 61478), (354, 59915), (521, 40710), (590, 35949), (690, 30739), (885, 23966), (1042, 20355), (1357, 15630), (1563, 13570), (1770, 11983), (2605, 8142), (2714, 7815), (3126, 6785), (4071, 5210)]