81567980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:259

約数の個数: 96

約数和(自身を含む): 193945920

約数和(自身を除く): 112377940

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 37, 52, 61, 65, 74, 122, 130, 139, 148, 185, 244, 260, 278, 305, 370, 481, 556, 610, 695, 740, 793, 962, 1220, 1390, 1586, 1807, 1924, 2257, 2405, 2780, 3172, 3614, 3965, 4514, 4810, 5143, 7228, 7930, 8479, 9028, 9035, 9620, 10286, 11285, 15860, 16958, 18070, 20572, 22570, 25715, 29341, 33916, 36140, 42395, 45140, 51430, 58682, 66859, 84790, 102860, 110227, 117364, 133718, 146705, 169580, 220454, 267436, 293410, 313723, 334295, 440908, 551135, 586820, 627446, 668590, 1102270, 1254892, 1337180, 1568615, 2204540, 3137230, 4078399, 6274460, 8156798, 16313596, 20391995, 40783990, 81567980]

約数ペア:

[(1, 81567980), (2, 40783990), (4, 20391995), (5, 16313596), (10, 8156798), (13, 6274460), (20, 4078399), (26, 3137230), (37, 2204540), (52, 1568615), (61, 1337180), (65, 1254892), (74, 1102270), (122, 668590), (130, 627446), (139, 586820), (148, 551135), (185, 440908), (244, 334295), (260, 313723), (278, 293410), (305, 267436), (370, 220454), (481, 169580), (556, 146705), (610, 133718), (695, 117364), (740, 110227), (793, 102860), (962, 84790), (1220, 66859), (1390, 58682), (1586, 51430), (1807, 45140), (1924, 42395), (2257, 36140), (2405, 33916), (2780, 29341), (3172, 25715), (3614, 22570), (3965, 20572), (4514, 18070), (4810, 16958), (5143, 15860), (7228, 11285), (7930, 10286), (8479, 9620), (9028, 9035)]