20913900

素因数分解:

$2^2\times 3^1\times 5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{433}}^1$

素因数の和:480

約数の個数: 144

約数和(自身を含む): 72328704

約数和(自身を除く): 51414804

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 23, 25, 28, 30, 35, 42, 46, 50, 60, 69, 70, 75, 84, 92, 100, 105, 115, 138, 140, 150, 161, 175, 210, 230, 276, 300, 322, 345, 350, 420, 433, 460, 483, 525, 575, 644, 690, 700, 805, 866, 966, 1050, 1150, 1299, 1380, 1610, 1725, 1732, 1932, 2100, 2165, 2300, 2415, 2598, 3031, 3220, 3450, 4025, 4330, 4830, 5196, 6062, 6495, 6900, 8050, 8660, 9093, 9660, 9959, 10825, 12075, 12124, 12990, 15155, 16100, 18186, 19918, 21650, 24150, 25980, 29877, 30310, 32475, 36372, 39836, 43300, 45465, 48300, 49795, 59754, 60620, 64950, 69713, 75775, 90930, 99590, 119508, 129900, 139426, 149385, 151550, 181860, 199180, 209139, 227325, 248975, 278852, 298770, 303100, 348565, 418278, 454650, 497950, 597540, 697130, 746925, 836556, 909300, 995900, 1045695, 1394260, 1493850, 1742825, 2091390, 2987700, 3485650, 4182780, 5228475, 6971300, 10456950, 20913900]

約数ペア:

[(1, 20913900), (2, 10456950), (3, 6971300), (4, 5228475), (5, 4182780), (6, 3485650), (7, 2987700), (10, 2091390), (12, 1742825), (14, 1493850), (15, 1394260), (20, 1045695), (21, 995900), (23, 909300), (25, 836556), (28, 746925), (30, 697130), (35, 597540), (42, 497950), (46, 454650), (50, 418278), (60, 348565), (69, 303100), (70, 298770), (75, 278852), (84, 248975), (92, 227325), (100, 209139), (105, 199180), (115, 181860), (138, 151550), (140, 149385), (150, 139426), (161, 129900), (175, 119508), (210, 99590), (230, 90930), (276, 75775), (300, 69713), (322, 64950), (345, 60620), (350, 59754), (420, 49795), (433, 48300), (460, 45465), (483, 43300), (525, 39836), (575, 36372), (644, 32475), (690, 30310), (700, 29877), (805, 25980), (866, 24150), (966, 21650), (1050, 19918), (1150, 18186), (1299, 16100), (1380, 15155), (1610, 12990), (1725, 12124), (1732, 12075), (1932, 10825), (2100, 9959), (2165, 9660), (2300, 9093), (2415, 8660), (2598, 8050), (3031, 6900), (3220, 6495), (3450, 6062), (4025, 5196), (4330, 4830)]