21723660

素因数分解:

$2^2\times 3^3\times 5^1\times 7^2\times {\mathrm{821}}^1$

素因数の和:853

約数の個数: 144

約数和(自身を含む): 78714720

約数和(自身を除く): 56991060

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 30, 35, 36, 42, 45, 49, 54, 60, 63, 70, 84, 90, 98, 105, 108, 126, 135, 140, 147, 180, 189, 196, 210, 245, 252, 270, 294, 315, 378, 420, 441, 490, 540, 588, 630, 735, 756, 821, 882, 945, 980, 1260, 1323, 1470, 1642, 1764, 1890, 2205, 2463, 2646, 2940, 3284, 3780, 4105, 4410, 4926, 5292, 5747, 6615, 7389, 8210, 8820, 9852, 11494, 12315, 13230, 14778, 16420, 17241, 22167, 22988, 24630, 26460, 28735, 29556, 34482, 36945, 40229, 44334, 49260, 51723, 57470, 68964, 73890, 80458, 86205, 88668, 103446, 110835, 114940, 120687, 147780, 155169, 160916, 172410, 201145, 206892, 221670, 241374, 258615, 310338, 344820, 362061, 402290, 443340, 482748, 517230, 603435, 620676, 724122, 775845, 804580, 1034460, 1086183, 1206870, 1448244, 1551690, 1810305, 2172366, 2413740, 3103380, 3620610, 4344732, 5430915, 7241220, 10861830, 21723660]

約数ペア:

[(1, 21723660), (2, 10861830), (3, 7241220), (4, 5430915), (5, 4344732), (6, 3620610), (7, 3103380), (9, 2413740), (10, 2172366), (12, 1810305), (14, 1551690), (15, 1448244), (18, 1206870), (20, 1086183), (21, 1034460), (27, 804580), (28, 775845), (30, 724122), (35, 620676), (36, 603435), (42, 517230), (45, 482748), (49, 443340), (54, 402290), (60, 362061), (63, 344820), (70, 310338), (84, 258615), (90, 241374), (98, 221670), (105, 206892), (108, 201145), (126, 172410), (135, 160916), (140, 155169), (147, 147780), (180, 120687), (189, 114940), (196, 110835), (210, 103446), (245, 88668), (252, 86205), (270, 80458), (294, 73890), (315, 68964), (378, 57470), (420, 51723), (441, 49260), (490, 44334), (540, 40229), (588, 36945), (630, 34482), (735, 29556), (756, 28735), (821, 26460), (882, 24630), (945, 22988), (980, 22167), (1260, 17241), (1323, 16420), (1470, 14778), (1642, 13230), (1764, 12315), (1890, 11494), (2205, 9852), (2463, 8820), (2646, 8210), (2940, 7389), (3284, 6615), (3780, 5747), (4105, 5292), (4410, 4926)]