256725640

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{83}}^1\times {\mathrm{1459}}^1$

素因数の和:1606

約数の個数: 64

約数和(自身を含む): 596030400

約数和(自身を除く): 339304760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 83, 106, 166, 212, 265, 332, 415, 424, 530, 664, 830, 1060, 1459, 1660, 2120, 2918, 3320, 4399, 5836, 7295, 8798, 11672, 14590, 17596, 21995, 29180, 35192, 43990, 58360, 77327, 87980, 121097, 154654, 175960, 242194, 309308, 386635, 484388, 605485, 618616, 773270, 968776, 1210970, 1546540, 2421940, 3093080, 4843880, 6418141, 12836282, 25672564, 32090705, 51345128, 64181410, 128362820, 256725640]

約数ペア:

[(1, 256725640), (2, 128362820), (4, 64181410), (5, 51345128), (8, 32090705), (10, 25672564), (20, 12836282), (40, 6418141), (53, 4843880), (83, 3093080), (106, 2421940), (166, 1546540), (212, 1210970), (265, 968776), (332, 773270), (415, 618616), (424, 605485), (530, 484388), (664, 386635), (830, 309308), (1060, 242194), (1459, 175960), (1660, 154654), (2120, 121097), (2918, 87980), (3320, 77327), (4399, 58360), (5836, 43990), (7295, 35192), (8798, 29180), (11672, 21995), (14590, 17596)]