20017504420

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{661517}}^1$

素因数の和:661632

約数の個数: 48

約数和(自身を含む): 45009684720

約数和(自身を除く): 24992180300

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 89, 170, 178, 340, 356, 445, 890, 1513, 1780, 3026, 6052, 7565, 15130, 30260, 661517, 1323034, 2646068, 3307585, 6615170, 11245789, 13230340, 22491578, 44983156, 56228945, 58875013, 112457890, 117750026, 224915780, 235500052, 294375065, 588750130, 1000875221, 1177500260, 2001750442, 4003500884, 5004376105, 10008752210, 20017504420]

約数ペア:

[(1, 20017504420), (2, 10008752210), (4, 5004376105), (5, 4003500884), (10, 2001750442), (17, 1177500260), (20, 1000875221), (34, 588750130), (68, 294375065), (85, 235500052), (89, 224915780), (170, 117750026), (178, 112457890), (340, 58875013), (356, 56228945), (445, 44983156), (890, 22491578), (1513, 13230340), (1780, 11245789), (3026, 6615170), (6052, 3307585), (7565, 2646068), (15130, 1323034), (30260, 661517)]