19175980

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{157}}^1\times {\mathrm{197}}^1$

素因数の和:394

約数の個数: 48

約数和(自身を含む): 42045696

約数和(自身を除く): 22869716

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 157, 197, 310, 314, 394, 620, 628, 785, 788, 985, 1570, 1970, 3140, 3940, 4867, 6107, 9734, 12214, 19468, 24335, 24428, 30535, 30929, 48670, 61070, 61858, 97340, 122140, 123716, 154645, 309290, 618580, 958799, 1917598, 3835196, 4793995, 9587990, 19175980]

約数ペア:

[(1, 19175980), (2, 9587990), (4, 4793995), (5, 3835196), (10, 1917598), (20, 958799), (31, 618580), (62, 309290), (124, 154645), (155, 123716), (157, 122140), (197, 97340), (310, 61858), (314, 61070), (394, 48670), (620, 30929), (628, 30535), (785, 24428), (788, 24335), (985, 19468), (1570, 12214), (1970, 9734), (3140, 6107), (3940, 4867)]