18738590

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:237

約数の個数: 64

約数和(自身を含む): 39372480

約数和(自身を除く): 20633890

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 61, 65, 85, 122, 130, 139, 170, 221, 278, 305, 442, 610, 695, 793, 1037, 1105, 1390, 1586, 1807, 2074, 2210, 2363, 3614, 3965, 4726, 5185, 7930, 8479, 9035, 10370, 11815, 13481, 16958, 18070, 23630, 26962, 30719, 42395, 61438, 67405, 84790, 110227, 134810, 144143, 153595, 220454, 288286, 307190, 551135, 720715, 1102270, 1441430, 1873859, 3747718, 9369295, 18738590]

約数ペア:

[(1, 18738590), (2, 9369295), (5, 3747718), (10, 1873859), (13, 1441430), (17, 1102270), (26, 720715), (34, 551135), (61, 307190), (65, 288286), (85, 220454), (122, 153595), (130, 144143), (139, 134810), (170, 110227), (221, 84790), (278, 67405), (305, 61438), (442, 42395), (610, 30719), (695, 26962), (793, 23630), (1037, 18070), (1105, 16958), (1390, 13481), (1586, 11815), (1807, 10370), (2074, 9035), (2210, 8479), (2363, 7930), (3614, 5185), (3965, 4726)]