21878220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{4007}}^1$

素因数の和:4039

約数の個数: 96

約数和(自身を含む): 75414528

約数和(自身を除く): 53536308

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 13, 14, 15, 20, 21, 26, 28, 30, 35, 39, 42, 52, 60, 65, 70, 78, 84, 91, 105, 130, 140, 156, 182, 195, 210, 260, 273, 364, 390, 420, 455, 546, 780, 910, 1092, 1365, 1820, 2730, 4007, 5460, 8014, 12021, 16028, 20035, 24042, 28049, 40070, 48084, 52091, 56098, 60105, 80140, 84147, 104182, 112196, 120210, 140245, 156273, 168294, 208364, 240420, 260455, 280490, 312546, 336588, 364637, 420735, 520910, 560980, 625092, 729274, 781365, 841470, 1041820, 1093911, 1458548, 1562730, 1682940, 1823185, 2187822, 3125460, 3646370, 4375644, 5469555, 7292740, 10939110, 21878220]

約数ペア:

[(1, 21878220), (2, 10939110), (3, 7292740), (4, 5469555), (5, 4375644), (6, 3646370), (7, 3125460), (10, 2187822), (12, 1823185), (13, 1682940), (14, 1562730), (15, 1458548), (20, 1093911), (21, 1041820), (26, 841470), (28, 781365), (30, 729274), (35, 625092), (39, 560980), (42, 520910), (52, 420735), (60, 364637), (65, 336588), (70, 312546), (78, 280490), (84, 260455), (91, 240420), (105, 208364), (130, 168294), (140, 156273), (156, 140245), (182, 120210), (195, 112196), (210, 104182), (260, 84147), (273, 80140), (364, 60105), (390, 56098), (420, 52091), (455, 48084), (546, 40070), (780, 28049), (910, 24042), (1092, 20035), (1365, 16028), (1820, 12021), (2730, 8014), (4007, 5460)]