21107220

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1$

素因数の和:225

約数の個数: 96

約数和(自身を含む): 61662720

約数和(自身を除く): 40555500

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 61, 73, 79, 122, 146, 158, 183, 219, 237, 244, 292, 305, 316, 365, 366, 395, 438, 474, 610, 730, 732, 790, 876, 915, 948, 1095, 1185, 1220, 1460, 1580, 1830, 2190, 2370, 3660, 4380, 4453, 4740, 4819, 5767, 8906, 9638, 11534, 13359, 14457, 17301, 17812, 19276, 22265, 23068, 24095, 26718, 28835, 28914, 34602, 44530, 48190, 53436, 57670, 57828, 66795, 69204, 72285, 86505, 89060, 96380, 115340, 133590, 144570, 173010, 267180, 289140, 346020, 351787, 703574, 1055361, 1407148, 1758935, 2110722, 3517870, 4221444, 5276805, 7035740, 10553610, 21107220]

約数ペア:

[(1, 21107220), (2, 10553610), (3, 7035740), (4, 5276805), (5, 4221444), (6, 3517870), (10, 2110722), (12, 1758935), (15, 1407148), (20, 1055361), (30, 703574), (60, 351787), (61, 346020), (73, 289140), (79, 267180), (122, 173010), (146, 144570), (158, 133590), (183, 115340), (219, 96380), (237, 89060), (244, 86505), (292, 72285), (305, 69204), (316, 66795), (365, 57828), (366, 57670), (395, 53436), (438, 48190), (474, 44530), (610, 34602), (730, 28914), (732, 28835), (790, 26718), (876, 24095), (915, 23068), (948, 22265), (1095, 19276), (1185, 17812), (1220, 17301), (1460, 14457), (1580, 13359), (1830, 11534), (2190, 9638), (2370, 8906), (3660, 5767), (4380, 4819), (4453, 4740)]