21363980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{269}}^1$

素因数の和:327

約数の個数: 72

約数和(自身を含む): 51846480

約数和(自身を除く): 30482500

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 269, 361, 380, 418, 538, 722, 836, 1045, 1076, 1345, 1444, 1805, 2090, 2690, 2959, 3610, 3971, 4180, 5111, 5380, 5918, 7220, 7942, 10222, 11836, 14795, 15884, 19855, 20444, 25555, 29590, 39710, 51110, 56221, 59180, 79420, 97109, 102220, 112442, 194218, 224884, 281105, 388436, 485545, 562210, 971090, 1068199, 1124420, 1942180, 2136398, 4272796, 5340995, 10681990, 21363980]

約数ペア:

[(1, 21363980), (2, 10681990), (4, 5340995), (5, 4272796), (10, 2136398), (11, 1942180), (19, 1124420), (20, 1068199), (22, 971090), (38, 562210), (44, 485545), (55, 388436), (76, 281105), (95, 224884), (110, 194218), (190, 112442), (209, 102220), (220, 97109), (269, 79420), (361, 59180), (380, 56221), (418, 51110), (538, 39710), (722, 29590), (836, 25555), (1045, 20444), (1076, 19855), (1345, 15884), (1444, 14795), (1805, 11836), (2090, 10222), (2690, 7942), (2959, 7220), (3610, 5918), (3971, 5380), (4180, 5111)]