28175220

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{997}}^1$

素因数の和:1169

約数の個数: 72

約数和(自身を含む): 86095464

約数和(自身を除く): 57920244

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 157, 180, 314, 471, 628, 785, 942, 997, 1413, 1570, 1884, 1994, 2355, 2826, 2991, 3140, 3988, 4710, 4985, 5652, 5982, 7065, 8973, 9420, 9970, 11964, 14130, 14955, 17946, 19940, 28260, 29910, 35892, 44865, 59820, 89730, 156529, 179460, 313058, 469587, 626116, 782645, 939174, 1408761, 1565290, 1878348, 2347935, 2817522, 3130580, 4695870, 5635044, 7043805, 9391740, 14087610, 28175220]

約数ペア:

[(1, 28175220), (2, 14087610), (3, 9391740), (4, 7043805), (5, 5635044), (6, 4695870), (9, 3130580), (10, 2817522), (12, 2347935), (15, 1878348), (18, 1565290), (20, 1408761), (30, 939174), (36, 782645), (45, 626116), (60, 469587), (90, 313058), (157, 179460), (180, 156529), (314, 89730), (471, 59820), (628, 44865), (785, 35892), (942, 29910), (997, 28260), (1413, 19940), (1570, 17946), (1884, 14955), (1994, 14130), (2355, 11964), (2826, 9970), (2991, 9420), (3140, 8973), (3988, 7065), (4710, 5982), (4985, 5652)]