398479640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1\times {\mathrm{149}}^1$

素因数の和:349

約数の個数: 128

約数和(自身を含む): 1005480000

約数和(自身を除く): 607000360

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 37, 40, 52, 65, 74, 104, 130, 139, 148, 149, 185, 260, 278, 296, 298, 370, 481, 520, 556, 596, 695, 740, 745, 962, 1112, 1192, 1390, 1480, 1490, 1807, 1924, 1937, 2405, 2780, 2980, 3614, 3848, 3874, 4810, 5143, 5513, 5560, 5960, 7228, 7748, 9035, 9620, 9685, 10286, 11026, 14456, 15496, 18070, 19240, 19370, 20572, 20711, 22052, 25715, 27565, 36140, 38740, 41144, 41422, 44104, 51430, 55130, 66859, 71669, 72280, 77480, 82844, 102860, 103555, 110260, 133718, 143338, 165688, 205720, 207110, 220520, 267436, 269243, 286676, 334295, 358345, 414220, 534872, 538486, 573352, 668590, 716690, 766307, 828440, 1076972, 1337180, 1346215, 1433380, 1532614, 2153944, 2674360, 2692430, 2866760, 3065228, 3831535, 5384860, 6130456, 7663070, 9961991, 10769720, 15326140, 19923982, 30652280, 39847964, 49809955, 79695928, 99619910, 199239820, 398479640]

約数ペア:

[(1, 398479640), (2, 199239820), (4, 99619910), (5, 79695928), (8, 49809955), (10, 39847964), (13, 30652280), (20, 19923982), (26, 15326140), (37, 10769720), (40, 9961991), (52, 7663070), (65, 6130456), (74, 5384860), (104, 3831535), (130, 3065228), (139, 2866760), (148, 2692430), (149, 2674360), (185, 2153944), (260, 1532614), (278, 1433380), (296, 1346215), (298, 1337180), (370, 1076972), (481, 828440), (520, 766307), (556, 716690), (596, 668590), (695, 573352), (740, 538486), (745, 534872), (962, 414220), (1112, 358345), (1192, 334295), (1390, 286676), (1480, 269243), (1490, 267436), (1807, 220520), (1924, 207110), (1937, 205720), (2405, 165688), (2780, 143338), (2980, 133718), (3614, 110260), (3848, 103555), (3874, 102860), (4810, 82844), (5143, 77480), (5513, 72280), (5560, 71669), (5960, 66859), (7228, 55130), (7748, 51430), (9035, 44104), (9620, 41422), (9685, 41144), (10286, 38740), (11026, 36140), (14456, 27565), (15496, 25715), (18070, 22052), (19240, 20711), (19370, 20572)]