20939880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{433}}^1$

素因数の和:491

約数の個数: 128

約数和(自身を含む): 69995520

約数和(自身を除く): 49055640

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 31, 39, 40, 52, 60, 62, 65, 78, 93, 104, 120, 124, 130, 155, 156, 186, 195, 248, 260, 310, 312, 372, 390, 403, 433, 465, 520, 620, 744, 780, 806, 866, 930, 1209, 1240, 1299, 1560, 1612, 1732, 1860, 2015, 2165, 2418, 2598, 3224, 3464, 3720, 4030, 4330, 4836, 5196, 5629, 6045, 6495, 8060, 8660, 9672, 10392, 11258, 12090, 12990, 13423, 16120, 16887, 17320, 22516, 24180, 25980, 26846, 28145, 33774, 40269, 45032, 48360, 51960, 53692, 56290, 67115, 67548, 80538, 84435, 107384, 112580, 134230, 135096, 161076, 168870, 174499, 201345, 225160, 268460, 322152, 337740, 348998, 402690, 523497, 536920, 675480, 697996, 805380, 872495, 1046994, 1395992, 1610760, 1744990, 2093988, 2617485, 3489980, 4187976, 5234970, 6979960, 10469940, 20939880]

約数ペア:

[(1, 20939880), (2, 10469940), (3, 6979960), (4, 5234970), (5, 4187976), (6, 3489980), (8, 2617485), (10, 2093988), (12, 1744990), (13, 1610760), (15, 1395992), (20, 1046994), (24, 872495), (26, 805380), (30, 697996), (31, 675480), (39, 536920), (40, 523497), (52, 402690), (60, 348998), (62, 337740), (65, 322152), (78, 268460), (93, 225160), (104, 201345), (120, 174499), (124, 168870), (130, 161076), (155, 135096), (156, 134230), (186, 112580), (195, 107384), (248, 84435), (260, 80538), (310, 67548), (312, 67115), (372, 56290), (390, 53692), (403, 51960), (433, 48360), (465, 45032), (520, 40269), (620, 33774), (744, 28145), (780, 26846), (806, 25980), (866, 24180), (930, 22516), (1209, 17320), (1240, 16887), (1299, 16120), (1560, 13423), (1612, 12990), (1732, 12090), (1860, 11258), (2015, 10392), (2165, 9672), (2418, 8660), (2598, 8060), (3224, 6495), (3464, 6045), (3720, 5629), (4030, 5196), (4330, 4836)]