21400020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1949}}^1$

素因数の和:2025

約数の個数: 72

約数和(自身を含む): 66011400

約数和(自身を除く): 44611380

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 61, 90, 122, 180, 183, 244, 305, 366, 549, 610, 732, 915, 1098, 1220, 1830, 1949, 2196, 2745, 3660, 3898, 5490, 5847, 7796, 9745, 10980, 11694, 17541, 19490, 23388, 29235, 35082, 38980, 58470, 70164, 87705, 116940, 118889, 175410, 237778, 350820, 356667, 475556, 594445, 713334, 1070001, 1188890, 1426668, 1783335, 2140002, 2377780, 3566670, 4280004, 5350005, 7133340, 10700010, 21400020]

約数ペア:

[(1, 21400020), (2, 10700010), (3, 7133340), (4, 5350005), (5, 4280004), (6, 3566670), (9, 2377780), (10, 2140002), (12, 1783335), (15, 1426668), (18, 1188890), (20, 1070001), (30, 713334), (36, 594445), (45, 475556), (60, 356667), (61, 350820), (90, 237778), (122, 175410), (180, 118889), (183, 116940), (244, 87705), (305, 70164), (366, 58470), (549, 38980), (610, 35082), (732, 29235), (915, 23388), (1098, 19490), (1220, 17541), (1830, 11694), (1949, 10980), (2196, 9745), (2745, 7796), (3660, 5847), (3898, 5490)]