81478540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{919}}^1$

素因数の和:983

約数の個数: 96

約数和(自身を含む): 207728640

約数和(自身を除く): 126250100

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 31, 44, 52, 55, 62, 65, 110, 124, 130, 143, 155, 220, 260, 286, 310, 341, 403, 572, 620, 682, 715, 806, 919, 1364, 1430, 1612, 1705, 1838, 2015, 2860, 3410, 3676, 4030, 4433, 4595, 6820, 8060, 8866, 9190, 10109, 11947, 17732, 18380, 20218, 22165, 23894, 28489, 40436, 44330, 47788, 50545, 56978, 59735, 88660, 101090, 113956, 119470, 131417, 142445, 202180, 238940, 262834, 284890, 313379, 370357, 525668, 569780, 626758, 657085, 740714, 1253516, 1314170, 1481428, 1566895, 1851785, 2628340, 3133790, 3703570, 4073927, 6267580, 7407140, 8147854, 16295708, 20369635, 40739270, 81478540]

約数ペア:

[(1, 81478540), (2, 40739270), (4, 20369635), (5, 16295708), (10, 8147854), (11, 7407140), (13, 6267580), (20, 4073927), (22, 3703570), (26, 3133790), (31, 2628340), (44, 1851785), (52, 1566895), (55, 1481428), (62, 1314170), (65, 1253516), (110, 740714), (124, 657085), (130, 626758), (143, 569780), (155, 525668), (220, 370357), (260, 313379), (286, 284890), (310, 262834), (341, 238940), (403, 202180), (572, 142445), (620, 131417), (682, 119470), (715, 113956), (806, 101090), (919, 88660), (1364, 59735), (1430, 56978), (1612, 50545), (1705, 47788), (1838, 44330), (2015, 40436), (2860, 28489), (3410, 23894), (3676, 22165), (4030, 20218), (4433, 18380), (4595, 17732), (6820, 11947), (8060, 10109), (8866, 9190)]