20448220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1$

素因数の和:155

約数の個数: 96

約数和(自身を含む): 49674240

約数和(自身を除く): 29226020

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 43, 52, 59, 62, 65, 86, 118, 124, 130, 155, 172, 215, 236, 260, 295, 310, 403, 430, 559, 590, 620, 767, 806, 860, 1118, 1180, 1333, 1534, 1612, 1829, 2015, 2236, 2537, 2666, 2795, 3068, 3658, 3835, 4030, 5074, 5332, 5590, 6665, 7316, 7670, 8060, 9145, 10148, 11180, 12685, 13330, 15340, 17329, 18290, 23777, 25370, 26660, 32981, 34658, 36580, 47554, 50740, 65962, 69316, 78647, 86645, 95108, 118885, 131924, 157294, 164905, 173290, 237770, 314588, 329810, 346580, 393235, 475540, 659620, 786470, 1022411, 1572940, 2044822, 4089644, 5112055, 10224110, 20448220]

約数ペア:

[(1, 20448220), (2, 10224110), (4, 5112055), (5, 4089644), (10, 2044822), (13, 1572940), (20, 1022411), (26, 786470), (31, 659620), (43, 475540), (52, 393235), (59, 346580), (62, 329810), (65, 314588), (86, 237770), (118, 173290), (124, 164905), (130, 157294), (155, 131924), (172, 118885), (215, 95108), (236, 86645), (260, 78647), (295, 69316), (310, 65962), (403, 50740), (430, 47554), (559, 36580), (590, 34658), (620, 32981), (767, 26660), (806, 25370), (860, 23777), (1118, 18290), (1180, 17329), (1333, 15340), (1534, 13330), (1612, 12685), (1829, 11180), (2015, 10148), (2236, 9145), (2537, 8060), (2666, 7670), (2795, 7316), (3068, 6665), (3658, 5590), (3835, 5332), (4030, 5074)]