21678430

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{1607}}^1$

素因数の和:1704

約数の個数: 32

約数和(自身を含む): 41679360

約数和(自身を除く): 20000930

約数列:

[1, 2, 5, 10, 19, 38, 71, 95, 142, 190, 355, 710, 1349, 1607, 2698, 3214, 6745, 8035, 13490, 16070, 30533, 61066, 114097, 152665, 228194, 305330, 570485, 1140970, 2167843, 4335686, 10839215, 21678430]

約数ペア:

[(1, 21678430), (2, 10839215), (5, 4335686), (10, 2167843), (19, 1140970), (38, 570485), (71, 305330), (95, 228194), (142, 152665), (190, 114097), (355, 61066), (710, 30533), (1349, 16070), (1607, 13490), (2698, 8035), (3214, 6745)]