21503060

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{797}}^1$

素因数の和:896

約数の個数: 48

約数和(自身を含む): 48263040

約数和(自身を除く): 26759980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 71, 76, 95, 142, 190, 284, 355, 380, 710, 797, 1349, 1420, 1594, 2698, 3188, 3985, 5396, 6745, 7970, 13490, 15143, 15940, 26980, 30286, 56587, 60572, 75715, 113174, 151430, 226348, 282935, 302860, 565870, 1075153, 1131740, 2150306, 4300612, 5375765, 10751530, 21503060]

約数ペア:

[(1, 21503060), (2, 10751530), (4, 5375765), (5, 4300612), (10, 2150306), (19, 1131740), (20, 1075153), (38, 565870), (71, 302860), (76, 282935), (95, 226348), (142, 151430), (190, 113174), (284, 75715), (355, 60572), (380, 56587), (710, 30286), (797, 26980), (1349, 15940), (1420, 15143), (1594, 13490), (2698, 7970), (3188, 6745), (3985, 5396)]