21349460

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{1831}}^1$

素因数の和:1904

約数の個数: 48

約数和(自身を含む): 49859712

約数和(自身を除く): 28510252

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 53, 55, 106, 110, 212, 220, 265, 530, 583, 1060, 1166, 1831, 2332, 2915, 3662, 5830, 7324, 9155, 11660, 18310, 20141, 36620, 40282, 80564, 97043, 100705, 194086, 201410, 388172, 402820, 485215, 970430, 1067473, 1940860, 2134946, 4269892, 5337365, 10674730, 21349460]

約数ペア:

[(1, 21349460), (2, 10674730), (4, 5337365), (5, 4269892), (10, 2134946), (11, 1940860), (20, 1067473), (22, 970430), (44, 485215), (53, 402820), (55, 388172), (106, 201410), (110, 194086), (212, 100705), (220, 97043), (265, 80564), (530, 40282), (583, 36620), (1060, 20141), (1166, 18310), (1831, 11660), (2332, 9155), (2915, 7324), (3662, 5830)]