19289725

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:230

約数の個数: 48

約数和(自身を含む): 30136960

約数和(自身を除く): 10847235

約数列:

[1, 5, 7, 13, 25, 35, 61, 65, 91, 139, 175, 305, 325, 427, 455, 695, 793, 973, 1525, 1807, 2135, 2275, 3475, 3965, 4865, 5551, 8479, 9035, 10675, 12649, 19825, 24325, 27755, 42395, 45175, 59353, 63245, 110227, 138775, 211975, 296765, 316225, 551135, 771589, 1483825, 2755675, 3857945, 19289725]

約数ペア:

[(1, 19289725), (5, 3857945), (7, 2755675), (13, 1483825), (25, 771589), (35, 551135), (61, 316225), (65, 296765), (91, 211975), (139, 138775), (175, 110227), (305, 63245), (325, 59353), (427, 45175), (455, 42395), (695, 27755), (793, 24325), (973, 19825), (1525, 12649), (1807, 10675), (2135, 9035), (2275, 8479), (3475, 5551), (3965, 4865)]