21204768

素因数分解:

$2^5\times 3^1\times {\mathrm{13}}^2\times {\mathrm{1307}}^1$

素因数の和:1346

約数の個数: 72

約数和(自身を含む): 60319728

約数和(自身を除く): 39114960

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 16, 24, 26, 32, 39, 48, 52, 78, 96, 104, 156, 169, 208, 312, 338, 416, 507, 624, 676, 1014, 1248, 1307, 1352, 2028, 2614, 2704, 3921, 4056, 5228, 5408, 7842, 8112, 10456, 15684, 16224, 16991, 20912, 31368, 33982, 41824, 50973, 62736, 67964, 101946, 125472, 135928, 203892, 220883, 271856, 407784, 441766, 543712, 662649, 815568, 883532, 1325298, 1631136, 1767064, 2650596, 3534128, 5301192, 7068256, 10602384, 21204768]

約数ペア:

[(1, 21204768), (2, 10602384), (3, 7068256), (4, 5301192), (6, 3534128), (8, 2650596), (12, 1767064), (13, 1631136), (16, 1325298), (24, 883532), (26, 815568), (32, 662649), (39, 543712), (48, 441766), (52, 407784), (78, 271856), (96, 220883), (104, 203892), (156, 135928), (169, 125472), (208, 101946), (312, 67964), (338, 62736), (416, 50973), (507, 41824), (624, 33982), (676, 31368), (1014, 20912), (1248, 16991), (1307, 16224), (1352, 15684), (2028, 10456), (2614, 8112), (2704, 7842), (3921, 5408), (4056, 5228)]