21228012

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{677}}^1$

素因数の和:767

約数の個数: 72

約数和(自身を含む): 58736496

約数和(自身を除く): 37508484

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 67, 78, 117, 134, 156, 201, 234, 268, 402, 468, 603, 677, 804, 871, 1206, 1354, 1742, 2031, 2412, 2613, 2708, 3484, 4062, 5226, 6093, 7839, 8124, 8801, 10452, 12186, 15678, 17602, 24372, 26403, 31356, 35204, 45359, 52806, 79209, 90718, 105612, 136077, 158418, 181436, 272154, 316836, 408231, 544308, 589667, 816462, 1179334, 1632924, 1769001, 2358668, 3538002, 5307003, 7076004, 10614006, 21228012]

約数ペア:

[(1, 21228012), (2, 10614006), (3, 7076004), (4, 5307003), (6, 3538002), (9, 2358668), (12, 1769001), (13, 1632924), (18, 1179334), (26, 816462), (36, 589667), (39, 544308), (52, 408231), (67, 316836), (78, 272154), (117, 181436), (134, 158418), (156, 136077), (201, 105612), (234, 90718), (268, 79209), (402, 52806), (468, 45359), (603, 35204), (677, 31356), (804, 26403), (871, 24372), (1206, 17602), (1354, 15678), (1742, 12186), (2031, 10452), (2412, 8801), (2613, 8124), (2708, 7839), (3484, 6093), (4062, 5226)]