21315320

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{179}}^1\times {\mathrm{229}}^1$

素因数の和:432

約数の個数: 64

約数和(自身を含む): 52164000

約数和(自身を除く): 30848680

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 179, 229, 260, 358, 458, 520, 716, 895, 916, 1145, 1432, 1790, 1832, 2290, 2327, 2977, 3580, 4580, 4654, 5954, 7160, 9160, 9308, 11635, 11908, 14885, 18616, 23270, 23816, 29770, 40991, 46540, 59540, 81982, 93080, 119080, 163964, 204955, 327928, 409910, 532883, 819820, 1065766, 1639640, 2131532, 2664415, 4263064, 5328830, 10657660, 21315320]

約数ペア:

[(1, 21315320), (2, 10657660), (4, 5328830), (5, 4263064), (8, 2664415), (10, 2131532), (13, 1639640), (20, 1065766), (26, 819820), (40, 532883), (52, 409910), (65, 327928), (104, 204955), (130, 163964), (179, 119080), (229, 93080), (260, 81982), (358, 59540), (458, 46540), (520, 40991), (716, 29770), (895, 23816), (916, 23270), (1145, 18616), (1432, 14885), (1790, 11908), (1832, 11635), (2290, 9308), (2327, 9160), (2977, 7160), (3580, 5954), (4580, 4654)]