20402460

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{8719}}^1$

素因数の和:8747

約数の個数: 72

約数和(自身を含む): 66655680

約数和(自身を除く): 46253220

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 52, 60, 65, 78, 90, 117, 130, 156, 180, 195, 234, 260, 390, 468, 585, 780, 1170, 2340, 8719, 17438, 26157, 34876, 43595, 52314, 78471, 87190, 104628, 113347, 130785, 156942, 174380, 226694, 261570, 313884, 340041, 392355, 453388, 523140, 566735, 680082, 784710, 1020123, 1133470, 1360164, 1569420, 1700205, 2040246, 2266940, 3400410, 4080492, 5100615, 6800820, 10201230, 20402460]

約数ペア:

[(1, 20402460), (2, 10201230), (3, 6800820), (4, 5100615), (5, 4080492), (6, 3400410), (9, 2266940), (10, 2040246), (12, 1700205), (13, 1569420), (15, 1360164), (18, 1133470), (20, 1020123), (26, 784710), (30, 680082), (36, 566735), (39, 523140), (45, 453388), (52, 392355), (60, 340041), (65, 313884), (78, 261570), (90, 226694), (117, 174380), (130, 156942), (156, 130785), (180, 113347), (195, 104628), (234, 87190), (260, 78471), (390, 52314), (468, 43595), (585, 34876), (780, 26157), (1170, 17438), (2340, 8719)]