21528120

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{173}}^1$

素因数の和:265

約数の個数: 128

約数和(自身を含む): 69906240

約数和(自身を除く): 48378120

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 30, 34, 40, 51, 60, 61, 68, 85, 102, 120, 122, 136, 170, 173, 183, 204, 244, 255, 305, 340, 346, 366, 408, 488, 510, 519, 610, 680, 692, 732, 865, 915, 1020, 1037, 1038, 1220, 1384, 1464, 1730, 1830, 2040, 2074, 2076, 2440, 2595, 2941, 3111, 3460, 3660, 4148, 4152, 5185, 5190, 5882, 6222, 6920, 7320, 8296, 8823, 10370, 10380, 10553, 11764, 12444, 14705, 15555, 17646, 20740, 20760, 21106, 23528, 24888, 29410, 31110, 31659, 35292, 41480, 42212, 44115, 52765, 58820, 62220, 63318, 70584, 84424, 88230, 105530, 117640, 124440, 126636, 158295, 176460, 179401, 211060, 253272, 316590, 352920, 358802, 422120, 538203, 633180, 717604, 897005, 1076406, 1266360, 1435208, 1794010, 2152812, 2691015, 3588020, 4305624, 5382030, 7176040, 10764060, 21528120]

約数ペア:

[(1, 21528120), (2, 10764060), (3, 7176040), (4, 5382030), (5, 4305624), (6, 3588020), (8, 2691015), (10, 2152812), (12, 1794010), (15, 1435208), (17, 1266360), (20, 1076406), (24, 897005), (30, 717604), (34, 633180), (40, 538203), (51, 422120), (60, 358802), (61, 352920), (68, 316590), (85, 253272), (102, 211060), (120, 179401), (122, 176460), (136, 158295), (170, 126636), (173, 124440), (183, 117640), (204, 105530), (244, 88230), (255, 84424), (305, 70584), (340, 63318), (346, 62220), (366, 58820), (408, 52765), (488, 44115), (510, 42212), (519, 41480), (610, 35292), (680, 31659), (692, 31110), (732, 29410), (865, 24888), (915, 23528), (1020, 21106), (1037, 20760), (1038, 20740), (1220, 17646), (1384, 15555), (1464, 14705), (1730, 12444), (1830, 11764), (2040, 10553), (2074, 10380), (2076, 10370), (2440, 8823), (2595, 8296), (2941, 7320), (3111, 6920), (3460, 6222), (3660, 5882), (4148, 5190), (4152, 5185)]