21015729

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{181}}^1$

素因数の和:310

約数の個数: 48

約数和(自身を含む): 37098880

約数和(自身を除く): 16083151

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 97, 133, 171, 181, 291, 399, 543, 679, 873, 1197, 1267, 1629, 1843, 2037, 3439, 3801, 5529, 6111, 10317, 11403, 12901, 16587, 17557, 24073, 30951, 38703, 52671, 72219, 116109, 122899, 158013, 216657, 333583, 368697, 1000749, 1106091, 2335081, 3002247, 7005243, 21015729]

約数ペア:

[(1, 21015729), (3, 7005243), (7, 3002247), (9, 2335081), (19, 1106091), (21, 1000749), (57, 368697), (63, 333583), (97, 216657), (133, 158013), (171, 122899), (181, 116109), (291, 72219), (399, 52671), (543, 38703), (679, 30951), (873, 24073), (1197, 17557), (1267, 16587), (1629, 12901), (1843, 11403), (2037, 10317), (3439, 6111), (3801, 5529)]