21528240

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{271}}^1\times {\mathrm{331}}^1$

素因数の和:618

約数の個数: 80

約数和(自身を含む): 67186176

約数和(自身を除く): 45657936

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 271, 331, 542, 662, 813, 993, 1084, 1324, 1355, 1626, 1655, 1986, 2168, 2648, 2710, 3252, 3310, 3972, 4065, 4336, 4965, 5296, 5420, 6504, 6620, 7944, 8130, 9930, 10840, 13008, 13240, 15888, 16260, 19860, 21680, 26480, 32520, 39720, 65040, 79440, 89701, 179402, 269103, 358804, 448505, 538206, 717608, 897010, 1076412, 1345515, 1435216, 1794020, 2152824, 2691030, 3588040, 4305648, 5382060, 7176080, 10764120, 21528240]

約数ペア:

[(1, 21528240), (2, 10764120), (3, 7176080), (4, 5382060), (5, 4305648), (6, 3588040), (8, 2691030), (10, 2152824), (12, 1794020), (15, 1435216), (16, 1345515), (20, 1076412), (24, 897010), (30, 717608), (40, 538206), (48, 448505), (60, 358804), (80, 269103), (120, 179402), (240, 89701), (271, 79440), (331, 65040), (542, 39720), (662, 32520), (813, 26480), (993, 21680), (1084, 19860), (1324, 16260), (1355, 15888), (1626, 13240), (1655, 13008), (1986, 10840), (2168, 9930), (2648, 8130), (2710, 7944), (3252, 6620), (3310, 6504), (3972, 5420), (4065, 5296), (4336, 4965)]