21669320

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{181}}^1$

素因数の和:306

約数の個数: 64

約数和(自身を含む): 50909040

約数和(自身を除く): 29239720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 73, 82, 146, 164, 181, 205, 292, 328, 362, 365, 410, 584, 724, 730, 820, 905, 1448, 1460, 1640, 1810, 2920, 2993, 3620, 5986, 7240, 7421, 11972, 13213, 14842, 14965, 23944, 26426, 29684, 29930, 37105, 52852, 59368, 59860, 66065, 74210, 105704, 119720, 132130, 148420, 264260, 296840, 528520, 541733, 1083466, 2166932, 2708665, 4333864, 5417330, 10834660, 21669320]

約数ペア:

[(1, 21669320), (2, 10834660), (4, 5417330), (5, 4333864), (8, 2708665), (10, 2166932), (20, 1083466), (40, 541733), (41, 528520), (73, 296840), (82, 264260), (146, 148420), (164, 132130), (181, 119720), (205, 105704), (292, 74210), (328, 66065), (362, 59860), (365, 59368), (410, 52852), (584, 37105), (724, 29930), (730, 29684), (820, 26426), (905, 23944), (1448, 14965), (1460, 14842), (1640, 13213), (1810, 11972), (2920, 7421), (2993, 7240), (3620, 5986)]