21390390

素因数分解:

$2^1\times 3^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{1787}}^1$

素因数の和:1826

約数の個数: 96

約数和(自身を含む): 66942720

約数和(自身を除く): 45552330

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 19, 21, 30, 35, 38, 42, 45, 57, 63, 70, 90, 95, 105, 114, 126, 133, 171, 190, 210, 266, 285, 315, 342, 399, 570, 630, 665, 798, 855, 1197, 1330, 1710, 1787, 1995, 2394, 3574, 3990, 5361, 5985, 8935, 10722, 11970, 12509, 16083, 17870, 25018, 26805, 32166, 33953, 37527, 53610, 62545, 67906, 75054, 80415, 101859, 112581, 125090, 160830, 169765, 187635, 203718, 225162, 237671, 305577, 339530, 375270, 475342, 509295, 562905, 611154, 713013, 1018590, 1125810, 1188355, 1426026, 1527885, 2139039, 2376710, 3055770, 3565065, 4278078, 7130130, 10695195, 21390390]

約数ペア:

[(1, 21390390), (2, 10695195), (3, 7130130), (5, 4278078), (6, 3565065), (7, 3055770), (9, 2376710), (10, 2139039), (14, 1527885), (15, 1426026), (18, 1188355), (19, 1125810), (21, 1018590), (30, 713013), (35, 611154), (38, 562905), (42, 509295), (45, 475342), (57, 375270), (63, 339530), (70, 305577), (90, 237671), (95, 225162), (105, 203718), (114, 187635), (126, 169765), (133, 160830), (171, 125090), (190, 112581), (210, 101859), (266, 80415), (285, 75054), (315, 67906), (342, 62545), (399, 53610), (570, 37527), (630, 33953), (665, 32166), (798, 26805), (855, 25018), (1197, 17870), (1330, 16083), (1710, 12509), (1787, 11970), (1995, 10722), (2394, 8935), (3574, 5985), (3990, 5361)]