20937540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1579}}^1$

素因数の和:1621

約数の個数: 96

約数和(自身を含む): 66890880

約数和(自身を除く): 45953340

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 17, 20, 26, 30, 34, 39, 51, 52, 60, 65, 68, 78, 85, 102, 130, 156, 170, 195, 204, 221, 255, 260, 340, 390, 442, 510, 663, 780, 884, 1020, 1105, 1326, 1579, 2210, 2652, 3158, 3315, 4420, 4737, 6316, 6630, 7895, 9474, 13260, 15790, 18948, 20527, 23685, 26843, 31580, 41054, 47370, 53686, 61581, 80529, 82108, 94740, 102635, 107372, 123162, 134215, 161058, 205270, 246324, 268430, 307905, 322116, 348959, 402645, 410540, 536860, 615810, 697918, 805290, 1046877, 1231620, 1395836, 1610580, 1744795, 2093754, 3489590, 4187508, 5234385, 6979180, 10468770, 20937540]

約数ペア:

[(1, 20937540), (2, 10468770), (3, 6979180), (4, 5234385), (5, 4187508), (6, 3489590), (10, 2093754), (12, 1744795), (13, 1610580), (15, 1395836), (17, 1231620), (20, 1046877), (26, 805290), (30, 697918), (34, 615810), (39, 536860), (51, 410540), (52, 402645), (60, 348959), (65, 322116), (68, 307905), (78, 268430), (85, 246324), (102, 205270), (130, 161058), (156, 134215), (170, 123162), (195, 107372), (204, 102635), (221, 94740), (255, 82108), (260, 80529), (340, 61581), (390, 53686), (442, 47370), (510, 41054), (663, 31580), (780, 26843), (884, 23685), (1020, 20527), (1105, 18948), (1326, 15790), (1579, 13260), (2210, 9474), (2652, 7895), (3158, 6630), (3315, 6316), (4420, 4737)]