21152820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{577}}^1$

素因数の和:649

約数の個数: 96

約数和(自身を含む): 65253888

約数和(自身を除く): 44101068

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 47, 52, 60, 65, 78, 94, 130, 141, 156, 188, 195, 235, 260, 282, 390, 470, 564, 577, 611, 705, 780, 940, 1154, 1222, 1410, 1731, 1833, 2308, 2444, 2820, 2885, 3055, 3462, 3666, 5770, 6110, 6924, 7332, 7501, 8655, 9165, 11540, 12220, 15002, 17310, 18330, 22503, 27119, 30004, 34620, 36660, 37505, 45006, 54238, 75010, 81357, 90012, 108476, 112515, 135595, 150020, 162714, 225030, 271190, 325428, 352547, 406785, 450060, 542380, 705094, 813570, 1057641, 1410188, 1627140, 1762735, 2115282, 3525470, 4230564, 5288205, 7050940, 10576410, 21152820]

約数ペア:

[(1, 21152820), (2, 10576410), (3, 7050940), (4, 5288205), (5, 4230564), (6, 3525470), (10, 2115282), (12, 1762735), (13, 1627140), (15, 1410188), (20, 1057641), (26, 813570), (30, 705094), (39, 542380), (47, 450060), (52, 406785), (60, 352547), (65, 325428), (78, 271190), (94, 225030), (130, 162714), (141, 150020), (156, 135595), (188, 112515), (195, 108476), (235, 90012), (260, 81357), (282, 75010), (390, 54238), (470, 45006), (564, 37505), (577, 36660), (611, 34620), (705, 30004), (780, 27119), (940, 22503), (1154, 18330), (1222, 17310), (1410, 15002), (1731, 12220), (1833, 11540), (2308, 9165), (2444, 8655), (2820, 7501), (2885, 7332), (3055, 6924), (3462, 6110), (3666, 5770)]