21510320

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{43}}^1$

素因数の和:119

約数の個数: 120

約数和(自身を含む): 56911536

約数和(自身を除く): 35401216

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 37, 40, 43, 52, 65, 74, 80, 86, 104, 130, 148, 169, 172, 185, 208, 215, 260, 296, 338, 344, 370, 430, 481, 520, 559, 592, 676, 688, 740, 845, 860, 962, 1040, 1118, 1352, 1480, 1591, 1690, 1720, 1924, 2236, 2405, 2704, 2795, 2960, 3182, 3380, 3440, 3848, 4472, 4810, 5590, 6253, 6364, 6760, 7267, 7696, 7955, 8944, 9620, 11180, 12506, 12728, 13520, 14534, 15910, 19240, 20683, 22360, 25012, 25456, 29068, 31265, 31820, 36335, 38480, 41366, 44720, 50024, 58136, 62530, 63640, 72670, 82732, 100048, 103415, 116272, 125060, 127280, 145340, 165464, 206830, 250120, 268879, 290680, 330928, 413660, 500240, 537758, 581360, 827320, 1075516, 1344395, 1654640, 2151032, 2688790, 4302064, 5377580, 10755160, 21510320]

約数ペア:

[(1, 21510320), (2, 10755160), (4, 5377580), (5, 4302064), (8, 2688790), (10, 2151032), (13, 1654640), (16, 1344395), (20, 1075516), (26, 827320), (37, 581360), (40, 537758), (43, 500240), (52, 413660), (65, 330928), (74, 290680), (80, 268879), (86, 250120), (104, 206830), (130, 165464), (148, 145340), (169, 127280), (172, 125060), (185, 116272), (208, 103415), (215, 100048), (260, 82732), (296, 72670), (338, 63640), (344, 62530), (370, 58136), (430, 50024), (481, 44720), (520, 41366), (559, 38480), (592, 36335), (676, 31820), (688, 31265), (740, 29068), (845, 25456), (860, 25012), (962, 22360), (1040, 20683), (1118, 19240), (1352, 15910), (1480, 14534), (1591, 13520), (1690, 12728), (1720, 12506), (1924, 11180), (2236, 9620), (2405, 8944), (2704, 7955), (2795, 7696), (2960, 7267), (3182, 6760), (3380, 6364), (3440, 6253), (3848, 5590), (4472, 4810)]