18940720

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{733}}^1$

素因数の和:782

約数の個数: 80

約数和(自身を含む): 49148640

約数和(自身を除く): 30207920

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 19, 20, 34, 38, 40, 68, 76, 80, 85, 95, 136, 152, 170, 190, 272, 304, 323, 340, 380, 646, 680, 733, 760, 1292, 1360, 1466, 1520, 1615, 2584, 2932, 3230, 3665, 5168, 5864, 6460, 7330, 11728, 12461, 12920, 13927, 14660, 24922, 25840, 27854, 29320, 49844, 55708, 58640, 62305, 69635, 99688, 111416, 124610, 139270, 199376, 222832, 236759, 249220, 278540, 473518, 498440, 557080, 947036, 996880, 1114160, 1183795, 1894072, 2367590, 3788144, 4735180, 9470360, 18940720]

約数ペア:

[(1, 18940720), (2, 9470360), (4, 4735180), (5, 3788144), (8, 2367590), (10, 1894072), (16, 1183795), (17, 1114160), (19, 996880), (20, 947036), (34, 557080), (38, 498440), (40, 473518), (68, 278540), (76, 249220), (80, 236759), (85, 222832), (95, 199376), (136, 139270), (152, 124610), (170, 111416), (190, 99688), (272, 69635), (304, 62305), (323, 58640), (340, 55708), (380, 49844), (646, 29320), (680, 27854), (733, 25840), (760, 24922), (1292, 14660), (1360, 13927), (1466, 12920), (1520, 12461), (1615, 11728), (2584, 7330), (2932, 6460), (3230, 5864), (3665, 5168)]