20987928

素因数分解:

$2^3\times 3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1319}}^1$

素因数の和:1361

約数の個数: 96

約数和(自身を含む): 64864800

約数和(自身を除く): 43876872

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 13, 17, 18, 24, 26, 34, 36, 39, 51, 52, 68, 72, 78, 102, 104, 117, 136, 153, 156, 204, 221, 234, 306, 312, 408, 442, 468, 612, 663, 884, 936, 1224, 1319, 1326, 1768, 1989, 2638, 2652, 3957, 3978, 5276, 5304, 7914, 7956, 10552, 11871, 15828, 15912, 17147, 22423, 23742, 31656, 34294, 44846, 47484, 51441, 67269, 68588, 89692, 94968, 102882, 134538, 137176, 154323, 179384, 201807, 205764, 269076, 291499, 308646, 403614, 411528, 538152, 582998, 617292, 807228, 874497, 1165996, 1234584, 1614456, 1748994, 2331992, 2623491, 3497988, 5246982, 6995976, 10493964, 20987928]

約数ペア:

[(1, 20987928), (2, 10493964), (3, 6995976), (4, 5246982), (6, 3497988), (8, 2623491), (9, 2331992), (12, 1748994), (13, 1614456), (17, 1234584), (18, 1165996), (24, 874497), (26, 807228), (34, 617292), (36, 582998), (39, 538152), (51, 411528), (52, 403614), (68, 308646), (72, 291499), (78, 269076), (102, 205764), (104, 201807), (117, 179384), (136, 154323), (153, 137176), (156, 134538), (204, 102882), (221, 94968), (234, 89692), (306, 68588), (312, 67269), (408, 51441), (442, 47484), (468, 44846), (612, 34294), (663, 31656), (884, 23742), (936, 22423), (1224, 17147), (1319, 15912), (1326, 15828), (1768, 11871), (1989, 10552), (2638, 7956), (2652, 7914), (3957, 5304), (3978, 5276)]