21309990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{541}}^1$

素因数の和:665

約数の個数: 64

約数和(自身を含む): 55726272

約数和(自身を除く): 34416282

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 101, 130, 195, 202, 303, 390, 505, 541, 606, 1010, 1082, 1313, 1515, 1623, 2626, 2705, 3030, 3246, 3939, 5410, 6565, 7033, 7878, 8115, 13130, 14066, 16230, 19695, 21099, 35165, 39390, 42198, 54641, 70330, 105495, 109282, 163923, 210990, 273205, 327846, 546410, 710333, 819615, 1420666, 1639230, 2130999, 3551665, 4261998, 7103330, 10654995, 21309990]

約数ペア:

[(1, 21309990), (2, 10654995), (3, 7103330), (5, 4261998), (6, 3551665), (10, 2130999), (13, 1639230), (15, 1420666), (26, 819615), (30, 710333), (39, 546410), (65, 327846), (78, 273205), (101, 210990), (130, 163923), (195, 109282), (202, 105495), (303, 70330), (390, 54641), (505, 42198), (541, 39390), (606, 35165), (1010, 21099), (1082, 19695), (1313, 16230), (1515, 14066), (1623, 13130), (2626, 8115), (2705, 7878), (3030, 7033), (3246, 6565), (3939, 5410)]