21507780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{1249}}^1$

素因数の和:1309

約数の個数: 96

約数和(自身を含む): 70560000

約数和(自身を除く): 49052220

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 41, 42, 60, 70, 82, 84, 105, 123, 140, 164, 205, 210, 246, 287, 410, 420, 492, 574, 615, 820, 861, 1148, 1230, 1249, 1435, 1722, 2460, 2498, 2870, 3444, 3747, 4305, 4996, 5740, 6245, 7494, 8610, 8743, 12490, 14988, 17220, 17486, 18735, 24980, 26229, 34972, 37470, 43715, 51209, 52458, 74940, 87430, 102418, 104916, 131145, 153627, 174860, 204836, 256045, 262290, 307254, 358463, 512090, 524580, 614508, 716926, 768135, 1024180, 1075389, 1433852, 1536270, 1792315, 2150778, 3072540, 3584630, 4301556, 5376945, 7169260, 10753890, 21507780]

約数ペア:

[(1, 21507780), (2, 10753890), (3, 7169260), (4, 5376945), (5, 4301556), (6, 3584630), (7, 3072540), (10, 2150778), (12, 1792315), (14, 1536270), (15, 1433852), (20, 1075389), (21, 1024180), (28, 768135), (30, 716926), (35, 614508), (41, 524580), (42, 512090), (60, 358463), (70, 307254), (82, 262290), (84, 256045), (105, 204836), (123, 174860), (140, 153627), (164, 131145), (205, 104916), (210, 102418), (246, 87430), (287, 74940), (410, 52458), (420, 51209), (492, 43715), (574, 37470), (615, 34972), (820, 26229), (861, 24980), (1148, 18735), (1230, 17486), (1249, 17220), (1435, 14988), (1722, 12490), (2460, 8743), (2498, 8610), (2870, 7494), (3444, 6245), (3747, 5740), (4305, 4996)]