21261780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1$

素因数の和:166

約数の個数: 144

約数和(自身を含む): 68612544

約数和(自身を除く): 47350764

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 41, 43, 45, 60, 67, 82, 86, 90, 123, 129, 134, 164, 172, 180, 201, 205, 215, 246, 258, 268, 335, 369, 387, 402, 410, 430, 492, 516, 603, 615, 645, 670, 738, 774, 804, 820, 860, 1005, 1206, 1230, 1290, 1340, 1476, 1548, 1763, 1845, 1935, 2010, 2412, 2460, 2580, 2747, 2881, 3015, 3526, 3690, 3870, 4020, 5289, 5494, 5762, 6030, 7052, 7380, 7740, 8241, 8643, 8815, 10578, 10988, 11524, 12060, 13735, 14405, 15867, 16482, 17286, 17630, 21156, 24723, 25929, 26445, 27470, 28810, 31734, 32964, 34572, 35260, 41205, 43215, 49446, 51858, 52890, 54940, 57620, 63468, 79335, 82410, 86430, 98892, 103716, 105780, 118121, 123615, 129645, 158670, 164820, 172860, 236242, 247230, 259290, 317340, 354363, 472484, 494460, 518580, 590605, 708726, 1063089, 1181210, 1417452, 1771815, 2126178, 2362420, 3543630, 4252356, 5315445, 7087260, 10630890, 21261780]

約数ペア:

[(1, 21261780), (2, 10630890), (3, 7087260), (4, 5315445), (5, 4252356), (6, 3543630), (9, 2362420), (10, 2126178), (12, 1771815), (15, 1417452), (18, 1181210), (20, 1063089), (30, 708726), (36, 590605), (41, 518580), (43, 494460), (45, 472484), (60, 354363), (67, 317340), (82, 259290), (86, 247230), (90, 236242), (123, 172860), (129, 164820), (134, 158670), (164, 129645), (172, 123615), (180, 118121), (201, 105780), (205, 103716), (215, 98892), (246, 86430), (258, 82410), (268, 79335), (335, 63468), (369, 57620), (387, 54940), (402, 52890), (410, 51858), (430, 49446), (492, 43215), (516, 41205), (603, 35260), (615, 34572), (645, 32964), (670, 31734), (738, 28810), (774, 27470), (804, 26445), (820, 25929), (860, 24723), (1005, 21156), (1206, 17630), (1230, 17286), (1290, 16482), (1340, 15867), (1476, 14405), (1548, 13735), (1763, 12060), (1845, 11524), (1935, 10988), (2010, 10578), (2412, 8815), (2460, 8643), (2580, 8241), (2747, 7740), (2881, 7380), (3015, 7052), (3526, 6030), (3690, 5762), (3870, 5494), (4020, 5289)]