21393840

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{6857}}^1$

素因数の和:6886

約数の個数: 80

約数和(自身を含む): 71432928

約数和(自身を除く): 50039088

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 39, 40, 48, 52, 60, 65, 78, 80, 104, 120, 130, 156, 195, 208, 240, 260, 312, 390, 520, 624, 780, 1040, 1560, 3120, 6857, 13714, 20571, 27428, 34285, 41142, 54856, 68570, 82284, 89141, 102855, 109712, 137140, 164568, 178282, 205710, 267423, 274280, 329136, 356564, 411420, 445705, 534846, 548560, 713128, 822840, 891410, 1069692, 1337115, 1426256, 1645680, 1782820, 2139384, 2674230, 3565640, 4278768, 5348460, 7131280, 10696920, 21393840]

約数ペア:

[(1, 21393840), (2, 10696920), (3, 7131280), (4, 5348460), (5, 4278768), (6, 3565640), (8, 2674230), (10, 2139384), (12, 1782820), (13, 1645680), (15, 1426256), (16, 1337115), (20, 1069692), (24, 891410), (26, 822840), (30, 713128), (39, 548560), (40, 534846), (48, 445705), (52, 411420), (60, 356564), (65, 329136), (78, 274280), (80, 267423), (104, 205710), (120, 178282), (130, 164568), (156, 137140), (195, 109712), (208, 102855), (240, 89141), (260, 82284), (312, 68570), (390, 54856), (520, 41142), (624, 34285), (780, 27428), (1040, 20571), (1560, 13714), (3120, 6857)]