21263060

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1669}}^1$

素因数の和:1705

約数の個数: 72

約数和(自身を含む): 55971720

約数和(自身を除く): 34708660

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 910, 980, 1274, 1669, 1820, 2548, 3185, 3338, 6370, 6676, 8345, 11683, 12740, 16690, 21697, 23366, 33380, 43394, 46732, 58415, 81781, 86788, 108485, 116830, 151879, 163562, 216970, 233660, 303758, 327124, 408905, 433940, 607516, 759395, 817810, 1063153, 1518790, 1635620, 2126306, 3037580, 4252612, 5315765, 10631530, 21263060]

約数ペア:

[(1, 21263060), (2, 10631530), (4, 5315765), (5, 4252612), (7, 3037580), (10, 2126306), (13, 1635620), (14, 1518790), (20, 1063153), (26, 817810), (28, 759395), (35, 607516), (49, 433940), (52, 408905), (65, 327124), (70, 303758), (91, 233660), (98, 216970), (130, 163562), (140, 151879), (182, 116830), (196, 108485), (245, 86788), (260, 81781), (364, 58415), (455, 46732), (490, 43394), (637, 33380), (910, 23366), (980, 21697), (1274, 16690), (1669, 12740), (1820, 11683), (2548, 8345), (3185, 6676), (3338, 6370)]