28240780

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^2\times {\mathrm{73}}^1$

素因数の和:163

約数の個数: 72

約数和(自身を含む): 64969632

約数和(自身を除く): 36728852

約数列:

[1, 2, 4, 5, 10, 20, 23, 29, 46, 58, 73, 92, 115, 116, 145, 146, 230, 290, 292, 365, 460, 580, 667, 730, 841, 1334, 1460, 1679, 1682, 2117, 2668, 3335, 3358, 3364, 4205, 4234, 6670, 6716, 8395, 8410, 8468, 10585, 13340, 16790, 16820, 19343, 21170, 33580, 38686, 42340, 48691, 61393, 77372, 96715, 97382, 122786, 193430, 194764, 243455, 245572, 306965, 386860, 486910, 613930, 973820, 1227860, 1412039, 2824078, 5648156, 7060195, 14120390, 28240780]

約数ペア:

[(1, 28240780), (2, 14120390), (4, 7060195), (5, 5648156), (10, 2824078), (20, 1412039), (23, 1227860), (29, 973820), (46, 613930), (58, 486910), (73, 386860), (92, 306965), (115, 245572), (116, 243455), (145, 194764), (146, 193430), (230, 122786), (290, 97382), (292, 96715), (365, 77372), (460, 61393), (580, 48691), (667, 42340), (730, 38686), (841, 33580), (1334, 21170), (1460, 19343), (1679, 16820), (1682, 16790), (2117, 13340), (2668, 10585), (3335, 8468), (3358, 8410), (3364, 8395), (4205, 6716), (4234, 6670)]