21213080

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{137}}^1$

素因数の和:241

約数の個数: 96

約数和(自身を含む): 56635200

約数和(自身を除く): 35422120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 79, 98, 137, 140, 158, 196, 245, 274, 280, 316, 392, 395, 490, 548, 553, 632, 685, 790, 959, 980, 1096, 1106, 1370, 1580, 1918, 1960, 2212, 2740, 2765, 3160, 3836, 3871, 4424, 4795, 5480, 5530, 6713, 7672, 7742, 9590, 10823, 11060, 13426, 15484, 19180, 19355, 21646, 22120, 26852, 30968, 33565, 38360, 38710, 43292, 53704, 54115, 67130, 75761, 77420, 86584, 108230, 134260, 151522, 154840, 216460, 268520, 303044, 378805, 432920, 530327, 606088, 757610, 1060654, 1515220, 2121308, 2651635, 3030440, 4242616, 5303270, 10606540, 21213080]

約数ペア:

[(1, 21213080), (2, 10606540), (4, 5303270), (5, 4242616), (7, 3030440), (8, 2651635), (10, 2121308), (14, 1515220), (20, 1060654), (28, 757610), (35, 606088), (40, 530327), (49, 432920), (56, 378805), (70, 303044), (79, 268520), (98, 216460), (137, 154840), (140, 151522), (158, 134260), (196, 108230), (245, 86584), (274, 77420), (280, 75761), (316, 67130), (392, 54115), (395, 53704), (490, 43292), (548, 38710), (553, 38360), (632, 33565), (685, 30968), (790, 26852), (959, 22120), (980, 21646), (1096, 19355), (1106, 19180), (1370, 15484), (1580, 13426), (1918, 11060), (1960, 10823), (2212, 9590), (2740, 7742), (2765, 7672), (3160, 6713), (3836, 5530), (3871, 5480), (4424, 4795)]