21808020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{383}}^1$

素因数の和:481

約数の個数: 96

約数和(自身を含む): 66834432

約数和(自身を除く): 45026412

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 73, 78, 130, 146, 156, 195, 219, 260, 292, 365, 383, 390, 438, 730, 766, 780, 876, 949, 1095, 1149, 1460, 1532, 1898, 1915, 2190, 2298, 2847, 3796, 3830, 4380, 4596, 4745, 4979, 5694, 5745, 7660, 9490, 9958, 11388, 11490, 14235, 14937, 18980, 19916, 22980, 24895, 27959, 28470, 29874, 49790, 55918, 56940, 59748, 74685, 83877, 99580, 111836, 139795, 149370, 167754, 279590, 298740, 335508, 363467, 419385, 559180, 726934, 838770, 1090401, 1453868, 1677540, 1817335, 2180802, 3634670, 4361604, 5452005, 7269340, 10904010, 21808020]

約数ペア:

[(1, 21808020), (2, 10904010), (3, 7269340), (4, 5452005), (5, 4361604), (6, 3634670), (10, 2180802), (12, 1817335), (13, 1677540), (15, 1453868), (20, 1090401), (26, 838770), (30, 726934), (39, 559180), (52, 419385), (60, 363467), (65, 335508), (73, 298740), (78, 279590), (130, 167754), (146, 149370), (156, 139795), (195, 111836), (219, 99580), (260, 83877), (292, 74685), (365, 59748), (383, 56940), (390, 55918), (438, 49790), (730, 29874), (766, 28470), (780, 27959), (876, 24895), (949, 22980), (1095, 19916), (1149, 18980), (1460, 14937), (1532, 14235), (1898, 11490), (1915, 11388), (2190, 9958), (2298, 9490), (2847, 7660), (3796, 5745), (3830, 5694), (4380, 4979), (4596, 4745)]