20861490

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{359}}^1$

素因数の和:531

約数の個数: 64

約数和(自身を含む): 54432000

約数和(自身を除く): 33570510

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 149, 195, 298, 359, 390, 447, 718, 745, 894, 1077, 1490, 1795, 1937, 2154, 2235, 3590, 3874, 4470, 4667, 5385, 5811, 9334, 9685, 10770, 11622, 14001, 19370, 23335, 28002, 29055, 46670, 53491, 58110, 70005, 106982, 140010, 160473, 267455, 320946, 534910, 695383, 802365, 1390766, 1604730, 2086149, 3476915, 4172298, 6953830, 10430745, 20861490]

約数ペア:

[(1, 20861490), (2, 10430745), (3, 6953830), (5, 4172298), (6, 3476915), (10, 2086149), (13, 1604730), (15, 1390766), (26, 802365), (30, 695383), (39, 534910), (65, 320946), (78, 267455), (130, 160473), (149, 140010), (195, 106982), (298, 70005), (359, 58110), (390, 53491), (447, 46670), (718, 29055), (745, 28002), (894, 23335), (1077, 19370), (1490, 14001), (1795, 11622), (1937, 10770), (2154, 9685), (2235, 9334), (3590, 5811), (3874, 5385), (4470, 4667)]