19979100

素因数分解:

$2^2\times 3^2\times 5^2\times {\mathrm{79}}^1\times {\mathrm{281}}^1$

素因数の和:380

約数の個数: 108

約数和(自身を含む): 63641760

約数和(自身を除く): 43662660

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 30, 36, 45, 50, 60, 75, 79, 90, 100, 150, 158, 180, 225, 237, 281, 300, 316, 395, 450, 474, 562, 711, 790, 843, 900, 948, 1124, 1185, 1405, 1422, 1580, 1686, 1975, 2370, 2529, 2810, 2844, 3372, 3555, 3950, 4215, 4740, 5058, 5620, 5925, 7025, 7110, 7900, 8430, 10116, 11850, 12645, 14050, 14220, 16860, 17775, 21075, 22199, 23700, 25290, 28100, 35550, 42150, 44398, 50580, 63225, 66597, 71100, 84300, 88796, 110995, 126450, 133194, 199791, 221990, 252900, 266388, 332985, 399582, 443980, 554975, 665970, 799164, 998955, 1109950, 1331940, 1664925, 1997910, 2219900, 3329850, 3995820, 4994775, 6659700, 9989550, 19979100]

約数ペア:

[(1, 19979100), (2, 9989550), (3, 6659700), (4, 4994775), (5, 3995820), (6, 3329850), (9, 2219900), (10, 1997910), (12, 1664925), (15, 1331940), (18, 1109950), (20, 998955), (25, 799164), (30, 665970), (36, 554975), (45, 443980), (50, 399582), (60, 332985), (75, 266388), (79, 252900), (90, 221990), (100, 199791), (150, 133194), (158, 126450), (180, 110995), (225, 88796), (237, 84300), (281, 71100), (300, 66597), (316, 63225), (395, 50580), (450, 44398), (474, 42150), (562, 35550), (711, 28100), (790, 25290), (843, 23700), (900, 22199), (948, 21075), (1124, 17775), (1185, 16860), (1405, 14220), (1422, 14050), (1580, 12645), (1686, 11850), (1975, 10116), (2370, 8430), (2529, 7900), (2810, 7110), (2844, 7025), (3372, 5925), (3555, 5620), (3950, 5058), (4215, 4740)]