21988386

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{47}}^2\times {\mathrm{79}}^1$

素因数の和:188

約数の個数: 72

約数和(自身を含む): 56334720

約数和(自身を除く): 34346334

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 47, 63, 79, 94, 126, 141, 158, 237, 282, 329, 423, 474, 553, 658, 711, 846, 987, 1106, 1422, 1659, 1974, 2209, 2961, 3318, 3713, 4418, 4977, 5922, 6627, 7426, 9954, 11139, 13254, 15463, 19881, 22278, 25991, 30926, 33417, 39762, 46389, 51982, 66834, 77973, 92778, 139167, 155946, 174511, 233919, 278334, 349022, 467838, 523533, 1047066, 1221577, 1570599, 2443154, 3141198, 3664731, 7329462, 10994193, 21988386]

約数ペア:

[(1, 21988386), (2, 10994193), (3, 7329462), (6, 3664731), (7, 3141198), (9, 2443154), (14, 1570599), (18, 1221577), (21, 1047066), (42, 523533), (47, 467838), (63, 349022), (79, 278334), (94, 233919), (126, 174511), (141, 155946), (158, 139167), (237, 92778), (282, 77973), (329, 66834), (423, 51982), (474, 46389), (553, 39762), (658, 33417), (711, 30926), (846, 25991), (987, 22278), (1106, 19881), (1422, 15463), (1659, 13254), (1974, 11139), (2209, 9954), (2961, 7426), (3318, 6627), (3713, 5922), (4418, 4977)]