21688380

素因数分解:

$2^2\times 3^2\times 5^1\times 7^2\times {\mathrm{2459}}^1$

素因数の和:2488

約数の個数: 108

約数和(自身を含む): 76560120

約数和(自身を除く): 54871740

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 49, 60, 63, 70, 84, 90, 98, 105, 126, 140, 147, 180, 196, 210, 245, 252, 294, 315, 420, 441, 490, 588, 630, 735, 882, 980, 1260, 1470, 1764, 2205, 2459, 2940, 4410, 4918, 7377, 8820, 9836, 12295, 14754, 17213, 22131, 24590, 29508, 34426, 36885, 44262, 49180, 51639, 68852, 73770, 86065, 88524, 103278, 110655, 120491, 147540, 154917, 172130, 206556, 221310, 240982, 258195, 309834, 344260, 361473, 442620, 481964, 516390, 602455, 619668, 722946, 774585, 1032780, 1084419, 1204910, 1445892, 1549170, 1807365, 2168838, 2409820, 3098340, 3614730, 4337676, 5422095, 7229460, 10844190, 21688380]

約数ペア:

[(1, 21688380), (2, 10844190), (3, 7229460), (4, 5422095), (5, 4337676), (6, 3614730), (7, 3098340), (9, 2409820), (10, 2168838), (12, 1807365), (14, 1549170), (15, 1445892), (18, 1204910), (20, 1084419), (21, 1032780), (28, 774585), (30, 722946), (35, 619668), (36, 602455), (42, 516390), (45, 481964), (49, 442620), (60, 361473), (63, 344260), (70, 309834), (84, 258195), (90, 240982), (98, 221310), (105, 206556), (126, 172130), (140, 154917), (147, 147540), (180, 120491), (196, 110655), (210, 103278), (245, 88524), (252, 86065), (294, 73770), (315, 68852), (420, 51639), (441, 49180), (490, 44262), (588, 36885), (630, 34426), (735, 29508), (882, 24590), (980, 22131), (1260, 17213), (1470, 14754), (1764, 12295), (2205, 9836), (2459, 8820), (2940, 7377), (4410, 4918)]