156780980

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{128509}}^1$

素因数の和:128579

約数の個数: 24

約数和(自身を含む): 334640040

約数和(自身を除く): 177859060

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 128509, 257018, 514036, 642545, 1285090, 2570180, 7839049, 15678098, 31356196, 39195245, 78390490, 156780980]

約数ペア:

[(1, 156780980), (2, 78390490), (4, 39195245), (5, 31356196), (10, 15678098), (20, 7839049), (61, 2570180), (122, 1285090), (244, 642545), (305, 514036), (610, 257018), (1220, 128509)]