21207804940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{257189}}^1$

素因数の和:257255

約数の個数: 96

約数和(自身を含む): 55306137600

約数和(自身を除く): 34098332660

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 31, 35, 38, 62, 70, 76, 95, 124, 133, 140, 155, 190, 217, 266, 310, 380, 434, 532, 589, 620, 665, 868, 1085, 1178, 1330, 2170, 2356, 2660, 2945, 4123, 4340, 5890, 8246, 11780, 16492, 20615, 41230, 82460, 257189, 514378, 1028756, 1285945, 1800323, 2571890, 3600646, 4886591, 5143780, 7201292, 7972859, 9001615, 9773182, 15945718, 18003230, 19546364, 24432955, 31891436, 34206137, 36006460, 39864295, 48865910, 55810013, 68412274, 79728590, 97731820, 111620026, 136824548, 151484321, 159457180, 171030685, 223240052, 279050065, 302968642, 342061370, 558100130, 605937284, 684122740, 757421605, 1060390247, 1116200260, 1514843210, 2120780494, 3029686420, 4241560988, 5301951235, 10603902470, 21207804940]

約数ペア:

[(1, 21207804940), (2, 10603902470), (4, 5301951235), (5, 4241560988), (7, 3029686420), (10, 2120780494), (14, 1514843210), (19, 1116200260), (20, 1060390247), (28, 757421605), (31, 684122740), (35, 605937284), (38, 558100130), (62, 342061370), (70, 302968642), (76, 279050065), (95, 223240052), (124, 171030685), (133, 159457180), (140, 151484321), (155, 136824548), (190, 111620026), (217, 97731820), (266, 79728590), (310, 68412274), (380, 55810013), (434, 48865910), (532, 39864295), (589, 36006460), (620, 34206137), (665, 31891436), (868, 24432955), (1085, 19546364), (1178, 18003230), (1330, 15945718), (2170, 9773182), (2356, 9001615), (2660, 7972859), (2945, 7201292), (4123, 5143780), (4340, 4886591), (5890, 3600646), (8246, 2571890), (11780, 1800323), (16492, 1285945), (20615, 1028756), (41230, 514378), (82460, 257189)]