399450890

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{643}}^1$

素因数の和:783

約数の個数: 64

約数和(自身を含む): 782320896

約数和(自身を除く): 382870006

約数列:

[1, 2, 5, 10, 23, 37, 46, 73, 74, 115, 146, 185, 230, 365, 370, 643, 730, 851, 1286, 1679, 1702, 2701, 3215, 3358, 4255, 5402, 6430, 8395, 8510, 13505, 14789, 16790, 23791, 27010, 29578, 46939, 47582, 62123, 73945, 93878, 118955, 124246, 147890, 234695, 237910, 310615, 469390, 547193, 621230, 1079597, 1094386, 1736743, 2159194, 2735965, 3473486, 5397985, 5471930, 8683715, 10795970, 17367430, 39945089, 79890178, 199725445, 399450890]

約数ペア:

[(1, 399450890), (2, 199725445), (5, 79890178), (10, 39945089), (23, 17367430), (37, 10795970), (46, 8683715), (73, 5471930), (74, 5397985), (115, 3473486), (146, 2735965), (185, 2159194), (230, 1736743), (365, 1094386), (370, 1079597), (643, 621230), (730, 547193), (851, 469390), (1286, 310615), (1679, 237910), (1702, 234695), (2701, 147890), (3215, 124246), (3358, 118955), (4255, 93878), (5402, 73945), (6430, 62123), (8395, 47582), (8510, 46939), (13505, 29578), (14789, 27010), (16790, 23791)]