21174740

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{541}}^1$

素因数の和:672

約数の個数: 48

約数和(自身を含む): 47349120

約数和(自身を除く): 26174380

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 103, 190, 206, 380, 412, 515, 541, 1030, 1082, 1957, 2060, 2164, 2705, 3914, 5410, 7828, 9785, 10279, 10820, 19570, 20558, 39140, 41116, 51395, 55723, 102790, 111446, 205580, 222892, 278615, 557230, 1058737, 1114460, 2117474, 4234948, 5293685, 10587370, 21174740]

約数ペア:

[(1, 21174740), (2, 10587370), (4, 5293685), (5, 4234948), (10, 2117474), (19, 1114460), (20, 1058737), (38, 557230), (76, 278615), (95, 222892), (103, 205580), (190, 111446), (206, 102790), (380, 55723), (412, 51395), (515, 41116), (541, 39140), (1030, 20558), (1082, 19570), (1957, 10820), (2060, 10279), (2164, 9785), (2705, 7828), (3914, 5410)]