21205860

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{877}}^1$

素因数の和:933

約数の個数: 96

約数和(自身を含む): 66081792

約数和(自身を除く): 44875932

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 31, 39, 52, 60, 62, 65, 78, 93, 124, 130, 155, 156, 186, 195, 260, 310, 372, 390, 403, 465, 620, 780, 806, 877, 930, 1209, 1612, 1754, 1860, 2015, 2418, 2631, 3508, 4030, 4385, 4836, 5262, 6045, 8060, 8770, 10524, 11401, 12090, 13155, 17540, 22802, 24180, 26310, 27187, 34203, 45604, 52620, 54374, 57005, 68406, 81561, 108748, 114010, 135935, 136812, 163122, 171015, 228020, 271870, 326244, 342030, 353431, 407805, 543740, 684060, 706862, 815610, 1060293, 1413724, 1631220, 1767155, 2120586, 3534310, 4241172, 5301465, 7068620, 10602930, 21205860]

約数ペア:

[(1, 21205860), (2, 10602930), (3, 7068620), (4, 5301465), (5, 4241172), (6, 3534310), (10, 2120586), (12, 1767155), (13, 1631220), (15, 1413724), (20, 1060293), (26, 815610), (30, 706862), (31, 684060), (39, 543740), (52, 407805), (60, 353431), (62, 342030), (65, 326244), (78, 271870), (93, 228020), (124, 171015), (130, 163122), (155, 136812), (156, 135935), (186, 114010), (195, 108748), (260, 81561), (310, 68406), (372, 57005), (390, 54374), (403, 52620), (465, 45604), (620, 34203), (780, 27187), (806, 26310), (877, 24180), (930, 22802), (1209, 17540), (1612, 13155), (1754, 12090), (1860, 11401), (2015, 10524), (2418, 8770), (2631, 8060), (3508, 6045), (4030, 5262), (4385, 4836)]