21286980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{827}}^1$

素因数の和:866

約数の個数: 144

約数和(自身を含む): 75950784

約数和(自身を除く): 54663804

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 15, 18, 20, 22, 26, 30, 33, 36, 39, 44, 45, 52, 55, 60, 65, 66, 78, 90, 99, 110, 117, 130, 132, 143, 156, 165, 180, 195, 198, 220, 234, 260, 286, 330, 390, 396, 429, 468, 495, 572, 585, 660, 715, 780, 827, 858, 990, 1170, 1287, 1430, 1654, 1716, 1980, 2145, 2340, 2481, 2574, 2860, 3308, 4135, 4290, 4962, 5148, 6435, 7443, 8270, 8580, 9097, 9924, 10751, 12405, 12870, 14886, 16540, 18194, 21502, 24810, 25740, 27291, 29772, 32253, 36388, 37215, 43004, 45485, 49620, 53755, 54582, 64506, 74430, 81873, 90970, 96759, 107510, 109164, 118261, 129012, 136455, 148860, 161265, 163746, 181940, 193518, 215020, 236522, 272910, 322530, 327492, 354783, 387036, 409365, 473044, 483795, 545820, 591305, 645060, 709566, 818730, 967590, 1064349, 1182610, 1419132, 1637460, 1773915, 1935180, 2128698, 2365220, 3547830, 4257396, 5321745, 7095660, 10643490, 21286980]

約数ペア:

[(1, 21286980), (2, 10643490), (3, 7095660), (4, 5321745), (5, 4257396), (6, 3547830), (9, 2365220), (10, 2128698), (11, 1935180), (12, 1773915), (13, 1637460), (15, 1419132), (18, 1182610), (20, 1064349), (22, 967590), (26, 818730), (30, 709566), (33, 645060), (36, 591305), (39, 545820), (44, 483795), (45, 473044), (52, 409365), (55, 387036), (60, 354783), (65, 327492), (66, 322530), (78, 272910), (90, 236522), (99, 215020), (110, 193518), (117, 181940), (130, 163746), (132, 161265), (143, 148860), (156, 136455), (165, 129012), (180, 118261), (195, 109164), (198, 107510), (220, 96759), (234, 90970), (260, 81873), (286, 74430), (330, 64506), (390, 54582), (396, 53755), (429, 49620), (468, 45485), (495, 43004), (572, 37215), (585, 36388), (660, 32253), (715, 29772), (780, 27291), (827, 25740), (858, 24810), (990, 21502), (1170, 18194), (1287, 16540), (1430, 14886), (1654, 12870), (1716, 12405), (1980, 10751), (2145, 9924), (2340, 9097), (2481, 8580), (2574, 8270), (2860, 7443), (3308, 6435), (4135, 5148), (4290, 4962)]