261339960

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{421}}^1\times {\mathrm{739}}^1$

素因数の和:1181

約数の個数: 128

約数和(自身を含む): 899366400

約数和(自身を除く): 638026440

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 421, 739, 840, 842, 1263, 1478, 1684, 2105, 2217, 2526, 2947, 2956, 3368, 3695, 4210, 4434, 5052, 5173, 5894, 5912, 6315, 7390, 8420, 8841, 8868, 10104, 10346, 11085, 11788, 12630, 14735, 14780, 15519, 16840, 17682, 17736, 20692, 22170, 23576, 25260, 25865, 29470, 29560, 31038, 35364, 41384, 44205, 44340, 50520, 51730, 58940, 62076, 70728, 77595, 88410, 88680, 103460, 117880, 124152, 155190, 176820, 206920, 310380, 311119, 353640, 620760, 622238, 933357, 1244476, 1555595, 1866714, 2177833, 2488952, 3111190, 3733428, 4355666, 4666785, 6222380, 6533499, 7466856, 8711332, 9333570, 10889165, 12444760, 13066998, 17422664, 18667140, 21778330, 26133996, 32667495, 37334280, 43556660, 52267992, 65334990, 87113320, 130669980, 261339960]

約数ペア:

[(1, 261339960), (2, 130669980), (3, 87113320), (4, 65334990), (5, 52267992), (6, 43556660), (7, 37334280), (8, 32667495), (10, 26133996), (12, 21778330), (14, 18667140), (15, 17422664), (20, 13066998), (21, 12444760), (24, 10889165), (28, 9333570), (30, 8711332), (35, 7466856), (40, 6533499), (42, 6222380), (56, 4666785), (60, 4355666), (70, 3733428), (84, 3111190), (105, 2488952), (120, 2177833), (140, 1866714), (168, 1555595), (210, 1244476), (280, 933357), (420, 622238), (421, 620760), (739, 353640), (840, 311119), (842, 310380), (1263, 206920), (1478, 176820), (1684, 155190), (2105, 124152), (2217, 117880), (2526, 103460), (2947, 88680), (2956, 88410), (3368, 77595), (3695, 70728), (4210, 62076), (4434, 58940), (5052, 51730), (5173, 50520), (5894, 44340), (5912, 44205), (6315, 41384), (7390, 35364), (8420, 31038), (8841, 29560), (8868, 29470), (10104, 25865), (10346, 25260), (11085, 23576), (11788, 22170), (12630, 20692), (14735, 17736), (14780, 17682), (15519, 16840)]