28345720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{151}}^1$

素因数の和:213

約数の個数: 96

約数和(自身を含む): 72969120

約数和(自身を除く): 44623400

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 26, 38, 40, 52, 65, 76, 95, 104, 130, 151, 152, 190, 247, 260, 302, 361, 380, 494, 520, 604, 722, 755, 760, 988, 1208, 1235, 1444, 1510, 1805, 1963, 1976, 2470, 2869, 2888, 3020, 3610, 3926, 4693, 4940, 5738, 6040, 7220, 7852, 9386, 9815, 9880, 11476, 14345, 14440, 15704, 18772, 19630, 22952, 23465, 28690, 37297, 37544, 39260, 46930, 54511, 57380, 74594, 78520, 93860, 109022, 114760, 149188, 186485, 187720, 218044, 272555, 298376, 372970, 436088, 545110, 708643, 745940, 1090220, 1417286, 1491880, 2180440, 2834572, 3543215, 5669144, 7086430, 14172860, 28345720]

約数ペア:

[(1, 28345720), (2, 14172860), (4, 7086430), (5, 5669144), (8, 3543215), (10, 2834572), (13, 2180440), (19, 1491880), (20, 1417286), (26, 1090220), (38, 745940), (40, 708643), (52, 545110), (65, 436088), (76, 372970), (95, 298376), (104, 272555), (130, 218044), (151, 187720), (152, 186485), (190, 149188), (247, 114760), (260, 109022), (302, 93860), (361, 78520), (380, 74594), (494, 57380), (520, 54511), (604, 46930), (722, 39260), (755, 37544), (760, 37297), (988, 28690), (1208, 23465), (1235, 22952), (1444, 19630), (1510, 18772), (1805, 15704), (1963, 14440), (1976, 14345), (2470, 11476), (2869, 9880), (2888, 9815), (3020, 9386), (3610, 7852), (3926, 7220), (4693, 6040), (4940, 5738)]