18503720

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{251}}^1$

素因数の和:378

約数の個数: 64

約数和(自身を含む): 44452800

約数和(自身を除く): 25949080

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 97, 152, 190, 194, 251, 380, 388, 485, 502, 760, 776, 970, 1004, 1255, 1843, 1940, 2008, 2510, 3686, 3880, 4769, 5020, 7372, 9215, 9538, 10040, 14744, 18430, 19076, 23845, 24347, 36860, 38152, 47690, 48694, 73720, 95380, 97388, 121735, 190760, 194776, 243470, 462593, 486940, 925186, 973880, 1850372, 2312965, 3700744, 4625930, 9251860, 18503720]

約数ペア:

[(1, 18503720), (2, 9251860), (4, 4625930), (5, 3700744), (8, 2312965), (10, 1850372), (19, 973880), (20, 925186), (38, 486940), (40, 462593), (76, 243470), (95, 194776), (97, 190760), (152, 121735), (190, 97388), (194, 95380), (251, 73720), (380, 48694), (388, 47690), (485, 38152), (502, 36860), (760, 24347), (776, 23845), (970, 19076), (1004, 18430), (1255, 14744), (1843, 10040), (1940, 9538), (2008, 9215), (2510, 7372), (3686, 5020), (3880, 4769)]